近日,观察到HBase集群出现如下WARN日志: 2020-04-18 16:17:03,081 WARN [regionserver/xxx-BucketCacheWriter-1] bucket.BucketCache:Failed allocation for 604acc82edd349ca906939af14464bcb_175674734; org.apache.hadoop.hbase.io.hfile.bucket.BucketAllocatorException: Alloca…

Hadoop基础-常见异常剖析之防坑小技巧 作者:尹正杰 版权声明:原创作品,谢绝转载!否则将追究法律责任.…

最近测试环境基于shc[https://github.com/hortonworks-spark/shc]的hbase-connector总是异常连接不到zookeeper,看下报错日志: 18/06/20 10:45:02 INFO RecoverableZooKeeper: Process identifier=hconnection-0x5175ab05 connecting to ZooKeeper ensemble=localhost:2181 18/06/20 10:45:02 IN…

hbase启动慢 hbase启动非常慢,要几个小时,查看日志,发现有如下异常信息: 2016-12-02 22:39:09,365 ERROR [RS_LOG_REPLAY_OPS-db-dn001:60020-1] wal.HLogFactory : Can't open after 24 attempts and 310206ms for hdfs://mycluster/hbase/WALs/db-dn 003.inc.mtime.com,60020,1480536673700-split…

HBase在大数据量并发写入时,写一段时间后HBase监控界面出现告警,写入程序日志里频繁出现异常java.util.concurrent.RejectedExecutionException: 从异常堆栈信息可以看出是flush请求时被拒绝引起的,核对一下flush的代码. 我们单位办公电脑在内网里,不便粘贴代码和异常信息,这里手动写几行代码大体说明情况. Configuration conf = HBaseConfiguration.create(); Connection connecti…

1. HBase is able to connect to ZooKeeper but the connection closes immediately hbase(main):001:0> list TABLE                                                                            ERROR: org.apache.hadoop.hbase.ZooKeeperConnectionException: HBase…

一. 1.client 整个HBase集群的访问入口: 使用HBase RPC机制与HMaster和HRegionServer进行通信: 与HMaster进行通信进行管理类操作: 与HRegionServer进行数据读写类操作: 包含访问HBase的接口,并维护cache来加快对HBase的访问 2.zookeeper 保证任何时候,集群中只有一个HMaster: 存贮所有HRegion的寻入口: 实时监控HRegion Server的上线和下线信息,并实时通知给HMaster: 存储HBase…

1. HBase is able to connect to ZooKeeper but the connection closes immediately hbase(main):001:0> list TABLE                                                                            ERROR: org.apache.hadoop.hbase.ZooKeeperConnectionException: HBase…

Region的概念 Region是HBase数据管理的基本单位.数据的move,数据的balance,数据的split,都是按照region来进行操作的. region中存储这用户的真实数据,而为了管理这些数据,HBase使用了RegionSever来管理region. 一个表中可以包含一个或多个Region. 每个Region只能被一个RS(RegionServer)提供服务,RS可以同时服务多个Region,来自不同RS上的Region组合成表格的整体逻辑视图. regionServer其实…

[From] https://mapr.com/blog/in-depth-look-hbase-architecture/ In this blog post, I’ll give you an in-depth look at the HBase architecture and its main benefits over NoSQL data store solutions. Be sure and read the first blog post in this series, tit…