greenplum全量恢复gprecoverseg -F出现Unable to connect to database时的相关分析及解决方法
之前有两位朋友碰到过在对greenplum的系统构架更改后，出现全量恢复gprecoverseg -F也无法正常执行的情况。
报错信息为Unable to connect to database. Retrying 1
gprecoverseg failed. (Reason='Unable to connect to database and start transaction') exiting...
有幸拷得一份虚拟机上的所有文件。对其进行分析。
发现事实上出现这个问题仅仅须要改动pg_changetracking下的CT_METADATA。或者说从其它正常的主事例上拷贝一份到出问题的主事例上就可以。
下面为大致分析的过程，感兴趣的能够看一下。
--启动数据库。有一个mirror出错。
[gpadmin@gpmaster ~]$ gpstart -a
20150727:22:28:21:001922 gpstart:gpmaster:gpadmin-[INFO]:-Starting gpstart with args: -a
20150727:22:28:21:001922 gpstart:gpmaster:gpadmin-[INFO]:-Gathering information and validating the environment...
20150727:22:28:28:001922 gpstart:gpmaster:gpadmin-[INFO]:-Greenplum Binary Version: 'postgres (Greenplum Database) 4.3.4.1 build 2'
20150727:22:28:28:001922 gpstart:gpmaster:gpadmin-[INFO]:-Greenplum Catalog Version: '201310150'
20150727:22:28:29:001922 gpstart:gpmaster:gpadmin-[INFO]:-Starting Master instance in admin mode
20150727:22:28:33:001922 gpstart:gpmaster:gpadmin-[INFO]:-Obtaining Greenplum Master catalog information
20150727:22:28:33:001922 gpstart:gpmaster:gpadmin-[INFO]:-Obtaining Segment details from master...
20150727:22:28:34:001922 gpstart:gpmaster:gpadmin-[INFO]:-Setting new master era
20150727:22:28:34:001922 gpstart:gpmaster:gpadmin-[INFO]:-Master Started...
20150727:22:28:34:001922 gpstart:gpmaster:gpadmin-[INFO]:-Shutting down master
20150727:22:28:36:001922 gpstart:gpmaster:gpadmin-[WARNING]:-Skipping startup of segment marked down in configuration: on gpslave-2 directory /data/mirror/gpseg0 <<<<<
20150727:22:28:36:001922 gpstart:gpmaster:gpadmin-[INFO]:-Commencing parallel primary and mirror segment instance startup, please wait...
...............................................
20150727:22:29:23:001922 gpstart:gpmaster:gpadmin-[INFO]:-Process results...
20150727:22:29:23:001922 gpstart:gpmaster:gpadmin-[INFO]:-----------------------------------------------------
20150727:22:29:23:001922 gpstart:gpmaster:gpadmin-[INFO]:- Successful segment starts = 3
20150727:22:29:23:001922 gpstart:gpmaster:gpadmin-[INFO]:- Failed segment starts = 0
20150727:22:29:23:001922 gpstart:gpmaster:gpadmin-[WARNING]:-Skipped segment starts (segments are marked down in configuration) = 1 <<<<<<<<
20150727:22:29:23:001922 gpstart:gpmaster:gpadmin-[INFO]:-----------------------------------------------------
20150727:22:29:23:001922 gpstart:gpmaster:gpadmin-[INFO]:-
20150727:22:29:23:001922 gpstart:gpmaster:gpadmin-[INFO]:-Successfully started 3 of 3 segment instances, skipped 1 other segments
20150727:22:29:23:001922 gpstart:gpmaster:gpadmin-[INFO]:-----------------------------------------------------
20150727:22:29:23:001922 gpstart:gpmaster:gpadmin-[WARNING]:-****************************************************************************
20150727:22:29:23:001922 gpstart:gpmaster:gpadmin-[WARNING]:-There are 1 segment(s) marked down in the database
20150727:22:29:23:001922 gpstart:gpmaster:gpadmin-[WARNING]:-To recover from this current state, review usage of the gprecoverseg
20150727:22:29:23:001922 gpstart:gpmaster:gpadmin-[WARNING]:-management utility which will recover failed segment instance databases.
20150727:22:29:23:001922 gpstart:gpmaster:gpadmin-[WARNING]:-****************************************************************************
20150727:22:29:23:001922 gpstart:gpmaster:gpadmin-[INFO]:-Starting Master instance gpmaster directory /data/master/gpseg-1
20150727:22:29:24:001922 gpstart:gpmaster:gpadmin-[INFO]:-Command pg_ctl reports Master gpmaster instance active
20150727:22:29:26:001922 gpstart:gpmaster:gpadmin-[INFO]:-No standby master configured. skipping...
20150727:22:29:26:001922 gpstart:gpmaster:gpadmin-[WARNING]:-Number of segments not attempted to start: 1
20150727:22:29:26:001922 gpstart:gpmaster:gpadmin-[INFO]:-Check status of database with gpstate utility
--运行全量恢复，5次尝试超时，提示Unable to connect to database and start transaction。
[gpadmin@gpmaster ~]$ gprecoverseg -F
20150727:22:38:04:002478 gprecoverseg:gpmaster:gpadmin-[INFO]:-Starting gprecoverseg with args: -F
20150727:22:38:04:002478 gprecoverseg:gpmaster:gpadmin-[INFO]:-local Greenplum Version: 'postgres (Greenplum Database) 4.3.4.1 build 2'
20150727:22:38:04:002478 gprecoverseg:gpmaster:gpadmin-[INFO]:-master Greenplum Version: 'PostgreSQL 8.2.15 (Greenplum Database 4.3.4.1 build 2) on x86_64-unknown-linux-gnu, compiled by GCC gcc (GCC) 4.4.2 compiled on Feb 10 2015 14:15:10'
20150727:22:38:04:002478 gprecoverseg:gpmaster:gpadmin-[INFO]:-Checking if segments are ready
20150727:22:38:04:002478 gprecoverseg:gpmaster:gpadmin-[INFO]:-Obtaining Segment details from master...
20150727:22:38:04:002478 gprecoverseg:gpmaster:gpadmin-[INFO]:-Unable to connect to database. Retrying 1
20150727:22:38:09:002478 gprecoverseg:gpmaster:gpadmin-[INFO]:-Checking if segments are ready
20150727:22:38:09:002478 gprecoverseg:gpmaster:gpadmin-[INFO]:-Obtaining Segment details from master...
20150727:22:38:09:002478 gprecoverseg:gpmaster:gpadmin-[INFO]:-Unable to connect to database. Retrying 2
20150727:22:38:14:002478 gprecoverseg:gpmaster:gpadmin-[INFO]:-Checking if segments are ready
20150727:22:38:14:002478 gprecoverseg:gpmaster:gpadmin-[INFO]:-Obtaining Segment details from master...
20150727:22:38:15:002478 gprecoverseg:gpmaster:gpadmin-[INFO]:-Unable to connect to database. Retrying 3
20150727:22:38:20:002478 gprecoverseg:gpmaster:gpadmin-[INFO]:-Checking if segments are ready
20150727:22:38:20:002478 gprecoverseg:gpmaster:gpadmin-[INFO]:-Obtaining Segment details from master...
20150727:22:38:20:002478 gprecoverseg:gpmaster:gpadmin-[INFO]:-Unable to connect to database. Retrying 4
20150727:22:38:25:002478 gprecoverseg:gpmaster:gpadmin-[INFO]:-Checking if segments are ready
20150727:22:38:25:002478 gprecoverseg:gpmaster:gpadmin-[INFO]:-Obtaining Segment details from master...
20150727:22:38:25:002478 gprecoverseg:gpmaster:gpadmin-[INFO]:-Unable to connect to database. Retrying 5
20150727:22:38:30:002478 gprecoverseg:gpmaster:gpadmin-[CRITICAL]:-gprecoverseg failed. (Reason='Unable to connect to database and start transaction') exiting...
--下面为相关节点的配置。
template1=# select * from gp_segment_configuration ;
dbid | content | role | preferred_role | mode | status | port | hostname | address | replication_port | san_mounts
------+---------+------+----------------+------+--------+-------+-----------+-----------+------------------+------------
1 | -1 | p | p | s | u | 5432 | gpmaster | gpmaster | |
2 | 0 | p | p | c | u | 40000 | gpslave-1 | gpslave-1 | 41000 |
4 | 0 | m | m | s | d | 50000 | gpslave-2 | gpslave-2 | 51000 |
3 | 1 | p | p | s | u | 40000 | gpslave-2 | gpslave-2 | 41000 |
5 | 1 | m | m | s | u | 50000 | gpslave-1 | gpslave-1 | 51000 |
(5 rows)
--在这里将content=1的mirror也停掉,该mirror恢复时应该是没有问题的。将其对照content=0上的mirror，来发现相关问题。
--又一次启动数据库。
[gpadmin@gpmaster ~]$ gpstart -a
20150727:22:49:41:002958 gpstart:gpmaster:gpadmin-[INFO]:-Starting gpstart with args: -a
20150727:22:49:41:002958 gpstart:gpmaster:gpadmin-[INFO]:-Gathering information and validating the environment...
20150727:22:49:41:002958 gpstart:gpmaster:gpadmin-[INFO]:-Greenplum Binary Version: 'postgres (Greenplum Database) 4.3.4.1 build 2'
20150727:22:49:42:002958 gpstart:gpmaster:gpadmin-[INFO]:-Greenplum Catalog Version: '201310150'
20150727:22:49:42:002958 gpstart:gpmaster:gpadmin-[INFO]:-Starting Master instance in admin mode
20150727:22:49:43:002958 gpstart:gpmaster:gpadmin-[INFO]:-Obtaining Greenplum Master catalog information
20150727:22:49:43:002958 gpstart:gpmaster:gpadmin-[INFO]:-Obtaining Segment details from master...
20150727:22:49:43:002958 gpstart:gpmaster:gpadmin-[INFO]:-Setting new master era
20150727:22:49:43:002958 gpstart:gpmaster:gpadmin-[INFO]:-Master Started...
20150727:22:49:43:002958 gpstart:gpmaster:gpadmin-[INFO]:-Shutting down master
20150727:22:49:44:002958 gpstart:gpmaster:gpadmin-[WARNING]:-Skipping startup of segment marked down in configuration: on gpslave-2 directory /data/mirror/gpseg0 <<<<<
20150727:22:49:44:002958 gpstart:gpmaster:gpadmin-[WARNING]:-Skipping startup of segment marked down in configuration: on gpslave-1 directory /data/mirror/gpseg1 <<<<<
20150727:22:49:44:002958 gpstart:gpmaster:gpadmin-[INFO]:-Commencing parallel primary and mirror segment instance startup, please wait.....
20150727:22:49:46:002958 gpstart:gpmaster:gpadmin-[INFO]:-Process results...
20150727:22:49:46:002958 gpstart:gpmaster:gpadmin-[INFO]:-----------------------------------------------------
20150727:22:49:46:002958 gpstart:gpmaster:gpadmin-[INFO]:- Successful segment starts = 2
20150727:22:49:46:002958 gpstart:gpmaster:gpadmin-[INFO]:- Failed segment starts = 0
20150727:22:49:46:002958 gpstart:gpmaster:gpadmin-[WARNING]:-Skipped segment starts (segments are marked down in configuration) = 2 <<<<<<<<
20150727:22:49:46:002958 gpstart:gpmaster:gpadmin-[INFO]:-----------------------------------------------------
20150727:22:49:46:002958 gpstart:gpmaster:gpadmin-[INFO]:-
20150727:22:49:46:002958 gpstart:gpmaster:gpadmin-[INFO]:-Successfully started 2 of 2 segment instances, skipped 2 other segments
20150727:22:49:46:002958 gpstart:gpmaster:gpadmin-[INFO]:-----------------------------------------------------
20150727:22:49:46:002958 gpstart:gpmaster:gpadmin-[WARNING]:-****************************************************************************
20150727:22:49:46:002958 gpstart:gpmaster:gpadmin-[WARNING]:-There are 2 segment(s) marked down in the database
20150727:22:49:46:002958 gpstart:gpmaster:gpadmin-[WARNING]:-To recover from this current state, review usage of the gprecoverseg
20150727:22:49:46:002958 gpstart:gpmaster:gpadmin-[WARNING]:-management utility which will recover failed segment instance databases.
20150727:22:49:46:002958 gpstart:gpmaster:gpadmin-[WARNING]:-****************************************************************************
20150727:22:49:46:002958 gpstart:gpmaster:gpadmin-[INFO]:-Starting Master instance gpmaster directory /data/master/gpseg-1
20150727:22:49:47:002958 gpstart:gpmaster:gpadmin-[INFO]:-Command pg_ctl reports Master gpmaster instance active
20150727:22:49:47:002958 gpstart:gpmaster:gpadmin-[INFO]:-No standby master configured. skipping...
20150727:22:49:47:002958 gpstart:gpmaster:gpadmin-[WARNING]:-Number of segments not attempted to start: 2
20150727:22:49:47:002958 gpstart:gpmaster:gpadmin-[INFO]:-Check status of database with gpstate utility
--如今的配置信息。
template1=# select * from gp_segment_configuration ;
dbid | content | role | preferred_role | mode | status | port | hostname | address | replication_port | san_mounts
------+---------+------+----------------+------+--------+-------+-----------+-----------+------------------+------------
1 | -1 | p | p | s | u | 5432 | gpmaster | gpmaster | |
2 | 0 | p | p | c | u | 40000 | gpslave-1 | gpslave-1 | 41000 |
4 | 0 | m | m | s | d | 50000 | gpslave-2 | gpslave-2 | 51000 |
3 | 1 | p | p | c | u | 40000 | gpslave-2 | gpslave-2 | 41000 |
5 | 1 | m | m | s | d | 50000 | gpslave-1 | gpslave-1 | 51000 |
(5 rows)
--运行全量恢复。并查看相关的具体信息。
[gpadmin@gpmaster ~]$ gprecoverseg -F -v
20150727:22:51:32:003078 gprecoverseg:gpmaster:gpadmin-[INFO]:-Starting gprecoverseg with args: -F -v
20150727:22:51:32:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-Checking if MASTER_DATA_DIRECTORY env variable is set.
20150727:22:51:32:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-Obtaining master's port from master data directory
20150727:22:51:32:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-Read from postgresql.conf port=5432
20150727:22:51:32:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-Read from postgresql.conf max_connections=200
20150727:22:51:32:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-Checking if GPHOME env variable is set.
20150727:22:51:32:003078 gprecoverseg:gpmaster:gpadmin-[INFO]:-local Greenplum Version: 'postgres (Greenplum Database) 4.3.4.1 build 2'
20150727:22:51:32:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-Connecting to dbname=template1
20150727:22:51:32:003078 gprecoverseg:gpmaster:gpadmin-[INFO]:-master Greenplum Version: 'PostgreSQL 8.2.15 (Greenplum Database 4.3.4.1 build 2) on x86_64-unknown-linux-gnu, compiled by GCC gcc (GCC) 4.4.2 compiled on Feb 10 2015 14:15:10'
20150727:22:51:32:003078 gprecoverseg:gpmaster:gpadmin-[INFO]:-Checking if segments are ready
20150727:22:51:32:003078 gprecoverseg:gpmaster:gpadmin-[INFO]:-Obtaining Segment details from master...
20150727:22:51:32:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-Connecting to dbname=template1
20150727:22:51:32:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-Validating configuration...
20150727:22:51:32:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-Sending msg getStatus and cmdStr $GPHOME/bin/gp_primarymirror -h gpslave-1 -p 40000
20150727:22:51:32:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-Adding cmd to work_queue: $GPHOME/bin/gp_primarymirror -h gpslave-1 -p 40000
20150727:22:51:32:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-Sending msg getStatus and cmdStr $GPHOME/bin/gp_primarymirror -h gpslave-2 -p 40000
20150727:22:51:32:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-Adding cmd to work_queue: $GPHOME/bin/gp_primarymirror -h gpslave-2 -p 40000
20150727:22:51:32:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker0] got cmd: $GPHOME/bin/gp_primarymirror -h gpslave-1 -p 40000
20150727:22:51:32:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker1] got cmd: $GPHOME/bin/gp_primarymirror -h gpslave-2 -p 40000
20150727:22:51:32:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker0] finished cmd: Get segment status cmdStr='ssh -o 'StrictHostKeyChecking no' gpslave-1 ". /usr/local/greenplum-db/./greenplum_path.sh; $GPHOME/bin/gp_primarymirror -h gpslave-1 -p 40000"' had result: cmd had rc=1 completed=True halted=False
stdout=''
stderr='mode: PrimarySegment
segmentState: ChangeTrackingDisabled --content=0的primary的状态是ChangeTrackingDisabled
dataState: InChangeTracking
faultType: NotInitialized
mode: PrimarySegment
segmentState: ChangeTrackingDisabled
dataState: InChangeTracking
faultType: NotInitialized
'
20150727:22:51:32:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker1] finished cmd: Get segment status cmdStr='ssh -o 'StrictHostKeyChecking no' gpslave-2 ". /usr/local/greenplum-db/./greenplum_path.sh; $GPHOME/bin/gp_primarymirror -h gpslave-2 -p 40000"' had result: cmd had rc=1 completed=True halted=False
stdout=''
stderr='mode: PrimarySegment
segmentState: Ready --content=1的primary的状态是Ready
dataState: InChangeTracking
faultType: NotInitialized
mode: PrimarySegment
segmentState: Ready
dataState: InChangeTracking
faultType: NotInitialized
'
20150727:22:51:32:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-Encountered error Not ready to connect to database mode: PrimarySegment
segmentState: ChangeTrackingDisabled --由此可见，之前无法运行全量恢复是因为content=0的primary有问题，与mirror无关
dataState: InChangeTracking
faultType: NotInitialized
mode: PrimarySegment
segmentState: ChangeTrackingDisabled
dataState: InChangeTracking
faultType: NotInitialized 20150727:22:51:32:003078 gprecoverseg:gpmaster:gpadmin-[INFO]:-Unable to connect to database. Retrying 1
^C20150727:22:51:34:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-WorkerPool haltWork()
20150727:22:51:34:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker0] haltWork
20150727:22:51:34:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker1] haltWork
20150727:22:51:34:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker2] haltWork
20150727:22:51:34:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker3] haltWork
20150727:22:51:34:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker4] haltWork
20150727:22:51:34:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker5] haltWork
20150727:22:51:34:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker6] haltWork
20150727:22:51:34:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker7] haltWork
20150727:22:51:34:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker8] haltWork
20150727:22:51:34:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker9] haltWork
20150727:22:51:34:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker10] haltWork
20150727:22:51:34:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker11] haltWork
20150727:22:51:34:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker12] haltWork
20150727:22:51:34:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker13] haltWork
20150727:22:51:34:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker14] haltWork
20150727:22:51:34:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker15] haltWork
20150727:22:51:37:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker5] stopping
20150727:22:51:37:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker3] stopping
20150727:22:51:37:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker6] stopping
20150727:22:51:37:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker4] stopping
20150727:22:51:37:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker2] stopping
20150727:22:51:37:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker7] stopping
20150727:22:51:37:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker9] stopping
20150727:22:51:37:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker10] stopping
20150727:22:51:37:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker12] stopping
20150727:22:51:37:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker8] stopping
20150727:22:51:37:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker11] stopping
20150727:22:51:37:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker14] stopping
20150727:22:51:37:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker13] stopping
20150727:22:51:37:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker15] stopping
20150727:22:51:37:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker0] stopping
20150727:22:51:37:003078 gprecoverseg:gpmaster:gpadmin-[DEBUG]:-[worker1] stopping User Interrupted
--查看content=0的primary此次启动的日志记录。与以下content=1的primary此次启动的日志记录对照，发现还是CHANGETRACKING有问题。并且gprecoverseg -F运行后没有产生日志记录，说明对应文件仅仅在数据库启动时生效。
[gpadmin@gpslave-1 pg_log]$ cat gpdb-2015-07-27_224945.csv
2015-07-27 22:49:46.228113 CST,"gpadmin","postgres",p2367,th2061358880,"[local]",,2015-07-27 22:49:46 CST,0,,,seg-1,,,,,"FATAL","57M01","the database system is in mirror or uninitialized mode",,,,,,,0,,"postmaster.c",2994,
2015-07-27 22:49:46.248685 CST,,,p2370,th2061358880,,,,0,,,seg-1,,,,,"LOG","00000","mirror transition, primary address(port) 'gpslave-1(41000)' mirror address(port) 'gpslave-2(51000)'",,,,,"mirroring role 'primary role' mirroring state 'change tracking' segment state 'not initialized' process name(pid) 'filerep main process(2370)' filerep state 'not initialized' ",,0,,"cdbfilerep.c",3472,
2015-07-27 22:49:46.252539 CST,,,p2371,th2061358880,,,,0,,,seg-1,,,,,"LOG","00000","CHANGETRACKING: ChangeTracking_RetrieveIsTransitionToInsync() found insync_transition_completed:'false' full resync:'true'",,,,,,,0,,"cdbresynchronizechangetracking.c",2545,
2015-07-27 22:49:46.252589 CST,,,p2371,th2061358880,,,,0,,,seg-1,,,,,"LOG","00000","CHANGETRACKING: ChangeTracking_RetrieveIsTransitionToResync() found resync_transition_completed:'false' full resync:'true'",,,,,,,0,,"cdbresynchronizechangetracking.c",2582,
2015-07-27 22:49:46.254921 CST,,,p2372,th2061358880,,,,0,,,seg-1,,,,,"LOG","00000","database system was shut down at 2015-07-27 22:46:49 CST",,,,,,,0,,"xlog.c",6372,
2015-07-27 22:49:46.255156 CST,,,p2372,th2061358880,,,,0,,,seg-1,,,,,"LOG","00000","checkpoint record is at 0/8C75AD8",,,,,,,0,,"xlog.c",6560,
2015-07-27 22:49:46.255194 CST,,,p2372,th2061358880,,,,0,,,seg-1,,,,,"LOG","00000","redo record is at 0/8C75AD8; undo record is at 0/0; shutdown TRUE",,,,,,,0,,"xlog.c",6617,
2015-07-27 22:49:46.255219 CST,,,p2372,th2061358880,,,,0,,,seg-1,,,,,"LOG","00000","next transaction ID: 0/3051; next OID: 43252",,,,,,,0,,"xlog.c",6621,
2015-07-27 22:49:46.255241 CST,,,p2372,th2061358880,,,,0,,,seg-1,,,,,"LOG","00000","next MultiXactId: 1; next MultiXactOffset: 0",,,,,,,0,,"xlog.c",6624,
2015-07-27 22:49:46.255280 CST,,,p2372,th2061358880,,,,0,,,seg-1,,,,,"LOG","00000","end of transaction log location is 0/8C75B70",,,,,,,0,,"xlog.c",6988,
2015-07-27 22:49:46.255863 CST,,,p2372,th2061358880,,,,0,,,seg-1,,,,,"LOG","00000","Oldest active transaction from prepared transactions 3051",,,,,,,0,,"xlog.c",6033,
2015-07-27 22:49:46.292261 CST,,,p2372,th2061358880,,,,0,,,seg-1,,,,,"LOG","00000","database system is ready",,,,,,,0,,"xlog.c",6084,
2015-07-27 22:49:46.292308 CST,,,p2372,th2061358880,,,,0,,,seg-1,,,,,"LOG","00000","PostgreSQL 8.2.15 (Greenplum Database 4.3.4.1 build 2) on x86_64-unknown-linux-gnu, compiled by GCC gcc (GCC) 4.4.2 compiled on Feb 10 2015 14:10:54",,,,,,,0,,"xlog.c",6095,
2015-07-27 22:49:46.294384 CST,,,p2372,th2061358880,,,,0,,,seg-1,,,,,"LOG","00000","Finished normal startup for clean shutdown case",,,,,,,0,,"xlog.c",7202,
2015-07-27 22:49:46.300763 CST,,,p2373,th2061358880,,,,0,,,seg-1,,,,,"LOG","00000","Finished BASIC startup integrity checking",,,,,,,0,,"xlog.c",7647,
2015-07-27 22:49:46.303294 CST,,,p2365,th2061358880,,,,0,,,seg-1,,,,,"LOG","00000","PostgreSQL 8.2.15 (Greenplum Database 4.3.4.1 build 2) on x86_64-unknown-linux-gnu, compiled by GCC gcc (GCC) 4.4.2 compiled on Feb 10 2015 14:13:47",,,,,,,0,,"postmaster.c",4640,
2015-07-27 22:49:46.303322 CST,,,p2365,th2061358880,,,,0,,,seg-1,,,,,"LOG","00000","database system is ready to accept connections","PostgreSQL 8.2.15 (Greenplum Database 4.3.4.1 build 2) on x86_64-unknown-linux-gnu, compiled by GCC gcc (GCC) 4.4.2 compiled on Feb 10 2015 14:13:47",,,,,,0,,"postmaster.c",4647,
2015-07-27 22:49:47.847981 CST,"gpadmin","template1",p2381,th2061358880,"192.168.22.110","5303",2015-07-27 22:49:47 CST,3054,con5,,seg0,,,x3054,sx1,"LOG","00000","gp_max_distributed_xid returning 1",,,,,,"select gp_max_distributed_xid()",0,,"cdbmaxdistributedxid.c",29, [gpadmin@gpslave-2 pg_log]$ cat gpdb-2015-07-27_224944.csv
2015-07-27 22:49:45.707976 CST,"gpadmin","postgres",p2302,th-240429280,"[local]",,2015-07-27 22:49:45 CST,0,,,seg-1,,,,,"FATAL","57M01","the database system is in mirror or uninitialized mode",,,,,,,0,,"postmaster.c",2994,
2015-07-27 22:49:45.726077 CST,,,p2305,th-240429280,,,,0,,,seg-1,,,,,"LOG","00000","mirror transition, primary address(port) 'gpslave-2(41000)' mirror address(port) 'gpslave-1(51000)'",,,,,"mirroring role 'primary role' mirroring state 'change tracking' segment state 'not initialized' process name(pid) 'filerep main process(2305)' filerep state 'not initialized' ",,0,,"cdbfilerep.c",3472,
2015-07-27 22:49:45.735230 CST,,,p2306,th-240429280,,,,0,,,seg-1,,,,,"LOG","00000","last checkpoint location for generating initial changetracking log 0/CC12DD8",,,,,,,0,,"xlog.c",11560,
2015-07-27 22:49:45.735376 CST,,,p2306,th-240429280,,,,0,,,seg-1,,,,,"WARNING","XX000","unable to read change tracking 'full log' file : Success (cdbresynchronizechangetracking.c:3382)",,,,,,,0,,"cdbresynchronizechangetracking.c",3382,
2015-07-27 22:49:45.735423 CST,,,p2306,th-240429280,,,,0,,,seg-1,,,,,"LOG","00000","last changetracked location in changetracking full log 0/0",,,,,,,0,,"xlog.c",11572,
2015-07-27 22:49:45.735475 CST,,,p2306,th-240429280,,,,0,,,seg-1,,,,,"LOG","00000","record with zero length at 0/CC12E70",,,,,,,0,,"xlog.c",4155,
2015-07-27 22:49:45.735505 CST,,,p2306,th-240429280,,,,0,,,seg-1,,,,,"LOG","00000","scanned through 1 initial xlog records since last checkpoint for writing into the resynchronize change log",,,,,,,0,,"cdbresynchronizechangetracking.c",206,
2015-07-27 22:49:45.736987 CST,,,p2307,th-240429280,,,,0,,,seg-1,,,,,"LOG","00000","database system was shut down at 2015-07-27 22:46:49 CST",,,,,,,0,,"xlog.c",6372,
2015-07-27 22:49:45.737260 CST,,,p2307,th-240429280,,,,0,,,seg-1,,,,,"LOG","00000","checkpoint record is at 0/CC12DD8",,,,,,,0,,"xlog.c",6560,
2015-07-27 22:49:45.737298 CST,,,p2307,th-240429280,,,,0,,,seg-1,,,,,"LOG","00000","redo record is at 0/CC12DD8; undo record is at 0/0; shutdown TRUE",,,,,,,0,,"xlog.c",6617,
2015-07-27 22:49:45.737322 CST,,,p2307,th-240429280,,,,0,,,seg-1,,,,,"LOG","00000","next transaction ID: 0/3006; next OID: 43252",,,,,,,0,,"xlog.c",6621,
2015-07-27 22:49:45.737343 CST,,,p2307,th-240429280,,,,0,,,seg-1,,,,,"LOG","00000","next MultiXactId: 1; next MultiXactOffset: 0",,,,,,,0,,"xlog.c",6624,
2015-07-27 22:49:45.737382 CST,,,p2307,th-240429280,,,,0,,,seg-1,,,,,"LOG","00000","end of transaction log location is 0/CC12E70",,,,,,,0,,"xlog.c",6988,
2015-07-27 22:49:45.738000 CST,,,p2307,th-240429280,,,,0,,,seg-1,,,,,"LOG","00000","Oldest active transaction from prepared transactions 3006",,,,,,,0,,"xlog.c",6033,
2015-07-27 22:49:45.743458 CST,,,p2307,th-240429280,,,,0,,,seg-1,,,,,"LOG","00000","database system is ready",,,,,,,0,,"xlog.c",6084,
2015-07-27 22:49:45.743497 CST,,,p2307,th-240429280,,,,0,,,seg-1,,,,,"LOG","00000","PostgreSQL 8.2.15 (Greenplum Database 4.3.4.1 build 2) on x86_64-unknown-linux-gnu, compiled by GCC gcc (GCC) 4.4.2 compiled on Feb 10 2015 14:10:54",,,,,,,0,,"xlog.c",6095,
2015-07-27 22:49:45.745424 CST,,,p2307,th-240429280,,,,0,,,seg-1,,,,,"LOG","00000","Finished normal startup for clean shutdown case",,,,,,,0,,"xlog.c",7202,
2015-07-27 22:49:45.751648 CST,,,p2308,th-240429280,,,,0,,,seg-1,,,,,"LOG","00000","Finished BASIC startup integrity checking",,,,,,,0,,"xlog.c",7647,
2015-07-27 22:49:45.754195 CST,,,p2300,th-240429280,,,,0,,,seg-1,,,,,"LOG","00000","PostgreSQL 8.2.15 (Greenplum Database 4.3.4.1 build 2) on x86_64-unknown-linux-gnu, compiled by GCC gcc (GCC) 4.4.2 compiled on Feb 10 2015 14:13:47",,,,,,,0,,"postmaster.c",4640,
2015-07-27 22:49:45.754222 CST,,,p2300,th-240429280,,,,0,,,seg-1,,,,,"LOG","00000","database system is ready to accept connections","PostgreSQL 8.2.15 (Greenplum Database 4.3.4.1 build 2) on x86_64-unknown-linux-gnu, compiled by GCC gcc (GCC) 4.4.2 compiled on Feb 10 2015 14:13:47",,,,,,0,,"postmaster.c",4647,
2015-07-27 22:49:47.296961 CST,"gpadmin","template1",p2316,th-240429280,"192.168.22.110","39217",2015-07-27 22:49:47 CST,3009,con5,,seg1,,,x3009,sx1,"LOG","00000","gp_max_distributed_xid returning 1",,,,,,"select gp_max_distributed_xid()",0,,"cdbmaxdistributedxid.c",29,
--查看/data/primary/gpseg0/pg_changetracking下的文件，就这么三个文件。而造成上面gprecoverseg无法运行的正是当中的CT_METADATA。
[gpadmin@gpslave-1 pg_changetracking]$ ll
total 102900
-rw-------. 1 gpadmin gpadmin 128 Jul 27 22:49 CT_METADATA --二进制文件，就是这个出问题了的，关于这个文件的信息，我也没有查到。
-rw-------. 1 gpadmin gpadmin 322636 Jul 27 22:46 FILEREP_CONFIG_LOG --记录配置变化的文件。
-rw-------. 1 gpadmin gpadmin 105028298 Jul 27 22:46 FILEREP_LOG --记录数据变化的文件。
--对照content=0的primary和content=1的primary，这两个文件还是不同。但详细信息我也不是非常清楚。
[gpadmin@gpslave-1 pg_changetracking]$ od -tx1 -tc -Ax CT_METADATA
000000 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00
\0 \0 \0 \0 \0 \0 \0 \0 001 \0 \0 \0 \0 \0 \0 \0
000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
\0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0
*
000080
[gpadmin@gpslave-2 pg_changetracking]$ od -tx1 -tc -Ax CT_METADATA
000000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
\0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0
*
000080
--将content=0的primary上的CT_METADATA重命名。并将content=1的primary上的CT_METADATA传到content=0的primary上。
[gpadmin@gpslave-2 pg_changetracking]$ scp CT_METADATA gpadmin@gpslave-1:/data/primary/gpseg0/pg_changetracking
CT_METADATA 100% 129 0.1KB/s 00:00
[gpadmin@gpslave-1 pg_changetracking]$ ll
total 102904
-rw-------. 1 gpadmin gpadmin 129 Jul 27 23:09 CT_METADATA
-rw-------. 1 gpadmin gpadmin 128 Jul 27 22:49 CT_METADATA_original
-rw-------. 1 gpadmin gpadmin 322636 Jul 27 22:46 FILEREP_CONFIG_LOG
-rw-------. 1 gpadmin gpadmin 105028298 Jul 27 22:46 FILEREP_LOG
--重新启动数据库。运行全量恢复成功。
[gpadmin@gpmaster ~]$ gpstart -a
[gpadmin@gpmaster ~]$ gprecoverseg -F
20150727:23:29:48:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Starting gprecoverseg with args: -F
20150727:23:29:48:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-local Greenplum Version: 'postgres (Greenplum Database) 4.3.4.1 build 2'
20150727:23:29:48:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-master Greenplum Version: 'PostgreSQL 8.2.15 (Greenplum Database 4.3.4.1 build 2) on x86_64-unknown-linux-gnu, compiled by GCC gcc (GCC) 4.4.2 compiled on Feb 10 2015 14:15:10'
20150727:23:29:48:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Checking if segments are ready
20150727:23:29:48:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Obtaining Segment details from master...
20150727:23:29:49:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Obtaining Segment details from master...
20150727:23:29:50:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Performing persistent table check
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Greenplum instance recovery parameters
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:----------------------------------------------------------
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Recovery type = Standard
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:----------------------------------------------------------
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Recovery 1 of 2
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:----------------------------------------------------------
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:- Synchronization mode = Full
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:- Failed instance host = gpslave-2
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:- Failed instance address = gpslave-2
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:- Failed instance directory = /data/mirror/gpseg0
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:- Failed instance port = 50000
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:- Failed instance replication port = 51000
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:- Recovery Source instance host = gpslave-1
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:- Recovery Source instance address = gpslave-1
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:- Recovery Source instance directory = /data/primary/gpseg0
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:- Recovery Source instance port = 40000
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:- Recovery Source instance replication port = 41000
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:- Recovery Target = in-place
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:----------------------------------------------------------
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Recovery 2 of 2
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:----------------------------------------------------------
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:- Synchronization mode = Full
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:- Failed instance host = gpslave-1
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:- Failed instance address = gpslave-1
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:- Failed instance directory = /data/mirror/gpseg1
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:- Failed instance port = 50000
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:- Failed instance replication port = 51000
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:- Recovery Source instance host = gpslave-2
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:- Recovery Source instance address = gpslave-2
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:- Recovery Source instance directory = /data/primary/gpseg1
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:- Recovery Source instance port = 40000
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:- Recovery Source instance replication port = 41000
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:- Recovery Target = in-place
20150727:23:30:30:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:---------------------------------------------------------- Continue with segment recovery procedure Yy|Nn (default=N):
> y
20150727:23:30:34:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-2 segment(s) to recover
20150727:23:30:34:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Ensuring 2 failed segment(s) are stopped 20150727:23:30:36:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Ensuring that shared memory is cleaned up for stopped segments
20150727:23:30:41:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Cleaning files from 2 segment(s)
..
20150727:23:30:43:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Building template directory
20150727:23:30:46:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Validating remote directories
.
20150727:23:30:47:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Copying template directory file
.
20150727:23:30:48:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Configuring new segments
.
20150727:23:30:49:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Cleaning files
.
20150727:23:30:50:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Starting file move procedure for gpslave-2:/data/mirror/gpseg0:content=0:dbid=4:mode=s:status=d
20150727:23:30:50:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Starting file move procedure for gpslave-1:/data/mirror/gpseg1:content=1:dbid=5:mode=s:status=d
updating flat files
20150727:23:30:50:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Updating configuration with new mirrors
20150727:23:30:50:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Updating mirrors
.
20150727:23:30:51:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Starting mirrors
20150727:23:30:51:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Commencing parallel primary and mirror segment instance startup, please wait...
............................................................................
20150727:23:32:10:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Process results...
20150727:23:32:10:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Updating configuration to mark mirrors up
20150727:23:32:10:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Updating primaries
20150727:23:32:10:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Commencing parallel primary conversion of 2 segments, please wait...
....
20150727:23:32:15:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Process results...
20150727:23:32:15:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Done updating primaries
20150727:23:32:15:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-******************************************************************
20150727:23:32:15:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Updating segments for resynchronization is completed.
20150727:23:32:15:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-For segments updated successfully, resynchronization will continue in the background.
20150727:23:32:15:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-
20150727:23:32:15:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-Use gpstate -s to check the resynchronization progress.
20150727:23:32:15:004102 gprecoverseg:gpmaster:gpadmin-[INFO]:-****************************************************************** [gpadmin@gpmaster ~]$ gpstate -e
20150727:23:34:45:005069 gpstate:gpmaster:gpadmin-[INFO]:-Starting gpstate with args: -e
20150727:23:34:45:005069 gpstate:gpmaster:gpadmin-[INFO]:-local Greenplum Version: 'postgres (Greenplum Database) 4.3.4.1 build 2'
20150727:23:34:45:005069 gpstate:gpmaster:gpadmin-[INFO]:-master Greenplum Version: 'PostgreSQL 8.2.15 (Greenplum Database 4.3.4.1 build 2) on x86_64-unknown-linux-gnu, compiled by GCC gcc (GCC) 4.4.2 compiled on Feb 10 2015 14:15:10'
20150727:23:34:45:005069 gpstate:gpmaster:gpadmin-[INFO]:-Obtaining Segment details from master...
20150727:23:34:45:005069 gpstate:gpmaster:gpadmin-[INFO]:-Gathering data from segments...
..
20150727:23:34:47:005069 gpstate:gpmaster:gpadmin-[INFO]:-----------------------------------------------------
20150727:23:34:47:005069 gpstate:gpmaster:gpadmin-[INFO]:-Segment Mirroring Status Report
20150727:23:34:47:005069 gpstate:gpmaster:gpadmin-[INFO]:-----------------------------------------------------
20150727:23:34:47:005069 gpstate:gpmaster:gpadmin-[INFO]:-All segments are running normally
--总结一下解决方法：当全量恢复gprecoverseg -F无法正常执行，且报错信息为Unable to connect to database. Retrying 1
gprecoverseg failed. (Reason='Unable to connect to database and start transaction') exiting...时。
从其它正常的主事例上拷贝一份data/primary/gpseg*/pg_changetracking下的CT_METADATA到出问题的主事例上,覆盖原CT_METADATA，然后启动数据库，就能够正常进行全量恢复了。
greenplum全量恢复gprecoverseg -F出现Unable to connect to database时的相关分析及解决方法的更多相关文章
- RDS数据库全量恢复方案
一.全量恢复 恢复最近的快照,将快找之前的数据全量恢复 二.增量恢复 下载对应的binlog日志导入到数据库 三.还没有备份的binlog日志获取方法 首先连接 RDS for MySQL 后查看当前 ...
- dblogin userid ogg ERROR: Unable to connect to database using user ogg
测试环境,初步配置ogg,添加ogg用户连接数据库,提示无权限报错. 1.0 报错信息 GGSCI (enmo) > dblogin userid ogg,password ogg ERROR: ...
- E: Unable to correct problems, you have held broken packages 解决方法
在Ubuntu中安装软件的时候经常碰到E: Unable to correct problems, you have held broken packages.的错误,顾名思义是因为某些软件包冲突导致 ...
- 【spring cloud】spring cloud2.X spring boot2.0.4调用feign配置Hystrix Dashboard 和 集成Turbine 【解决：Hystrix仪表盘Unable to connect to Command Metric Stream】【解决：Hystrix仪表盘Loading...】
环境: <java.version>1.8</java.version><spring-boot.version>2.0.4.RELEASE</spring- ...
- ERROR: JDWP Unable to get JNI 1.2 environment的错误解决方法
在用java编程的时候,在debug模式下偶尔会出现下面的错误,jdk1.6.0-rc1: ERROR: JDWP Unable to get JNI 1.2 environment, jvm-> ...
- Unable to execute dex: Multiple dex files define 的解决方法
我们在引入library时可能会出现这个错误 比如: [2013-11-05 14:22:15 - Dex Loader] Unable to execute dex: Multiple dex fi ...
- orcal 数据库 maven架构 ssh框架 的全注解环境模版 maven中央仓库批量删除lastupdated文件后依然是lastupdated解决方法 mirror aliyun中央仓库
批量删除文件,得用批处理文件,文件名随便,路径改成你的Repository,代码如下 rem 这里写你的仓库路径 set REPOSITORY_PATH=d:\repo rem 正在搜索... for ...
- Android studio初次安装启动时弹出unable to access android sdk add-on list提示的解决方法
一.问题描述 初次安装Android Studio,启动后,报错如下: unable to access android sdk add-on lis 如图: 二.原因分析 AS启动后,会在默认路径下 ...
- Configuration problem: Unable to locate Spring NamespaceHandler for XML schema namespace 解决方法
这个问题是在用到spring时,本地IDE里面跑的很正常,但是打包后在集群上运行时报错. 多方查找资料后确定了问题的根源,由于在依赖中调用了spring的许多包,会存在文件覆盖的情况. 具体是 这三个 ...
随机推荐
- php求斐波那契数列
<?php function feibonaqi(){ //参数$num表示为第$num个数之前的所有斐波那契数列 $arr = array(); //定义一个空变量用来存放斐波那契数列的数组 ...
- 让你的 wowza server提供 RESTful web 服务
有时我们 nginx 须要和 wowza 服务器交互以进行一些 LB 事宜:有时我们的管理员须要实时了解 wowza 服务器的一些其它状态信息(比方一些自己定义对象的状态等等).而用 ...
- UIKit class hierarchy
watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvY3puY2Rtcw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA ...
- docker 中 安装 openssh-server
1,首先,需要从docker官网获得centos或Ubuntu镜像 2,当本地已有Ubuntu镜像后(大概200M左右大小),使用如下命令 docker run -t -i ubuntu /bin/b ...
- 设置SSH编码为中文
http://www.qzz.in/?post=198下面是详细方法: 方法1: vi /etc/sysconfig/i18n 将内容改为 LANG="zh_CN.GB18030" ...
- java基础讲解04-----数据类型和运算符
1.java的基本数据类型 1.数值型 { 整数型 byte , short ,int ,long 浮点型 float , double } 2.字符型 3.布尔型 2.运算符 1.赋 ...
- Spring技术内幕：Spring AOP的实现原理（三）
生成SingleTon代理对象在getSingleTonInstance方法中完毕,这种方法时ProxyFactoryBean生成AopProxy对象的入口.代理对象会封装对target目标对象的调用 ...
- Javascript 中使用Json的四种途径
1.jQuery插件支持的转换方式: 复制代码代码如下: $.parseJSON( jsonstr ); //jQuery.parseJSON(jsonstr),可以将json字符串转换成json对象 ...
- 优化数据页面（22）——n:n的数据关系
设计要点:优化数据页面.界面设计.美化exce 阿金:那n::n就复杂了,你倒是想留有空间. 可是现实社会有时却不同意. 秀秀:唉.说的也是. 阿金:那怎么表达才合适啊? 秀秀:仅仅实用网格了. 阿金 ...
- Atitit.判断汉字的编码 regedit 注册表里面的reg_sz
Atitit.判断汉字的编码 regedit 注册表里面的reg_sz 1. 可以判断出是unicode编码1 2. 有下面分割ucs2 大头小偷编码1 3. 使用小偷编码测试1 4. 注册表里面的r ...