在写多进程的时候我发现一个问题,用Pool的apply_async(异步非阻塞)的时候传入实例函数会出错,或者说是子进程被跳过似的感觉(python2.7). 但是用python3.7的话没有任何问题. code: # -*- coding:utf-8 -*- import multiprocessing import os import time class A(object): def __init__(self): pass @staticmethod def func(msg): pri

1 : An another FPM instance seems to already listen on /tmp/php-cgi.sock有关/tem/php-cgi.sock问题查看进程可以或者log文件可以看到php-fpm已正常运行 service php-fpm stop Gracefully shutting down php-fpm warning,no pid file found – php-fpm is not running? 查看进程可以看到php-fpm进程未被关闭

项目启动报错: [2016-07-13 10:04:15,074] ERROR org.apache.ibatis.executor.BaseExecutor Could not get a databaseId from dataSource java.sql.SQLException: Connections could not be acquired from the underlying database! at com.mchange.v2.sql.SqlUtils.toSQLExce

一.问题描述 在Django视图函数中,导入 gevent 模块 import gevent from gevent import monkey; monkey.patch_all() from gevent.pool import Pool 启动Django报错: MonkeyPatchWarning: Monkey-patching outside the main native thread. Some APIs will not be available. Expect a KeyErr

19/11/24 08:29:08 INFO qlh.MyMapreduce: ================this is job================= 19/11/24 08:29:09 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 19/11/24 08:29:10

问题 之前在调用class内的函数用multiprocessing模块的pool函数进行多线程处理的时候报了以下下错误信息: PicklingError: Can't pickle <type 'function'>: attribute lookup __builtin__.function failed 查了下官方文档发现python默认只能pickle以下的类型: None, True, and False integers, floating point numbers, comple

上面一堆tomcat启动的提示信息省略掉,下面是报错的具体信息:org.apache.tomcat.util.bcel.classfile.ClassFormatException: Invalid byte tag in constant pool: 15 at org.apache.tomcat.util.bcel.classfile.Constant.readConstant(Constant.java:131) at org.apache.tomcat.util.bcel.classfi

Selenium Grid 运行报错 : Exception thrown in Navigator.Start first time ->Error forwarding the new session Empty pool of VM for setup Capabilities [{platform=WINDOWS, ensureCleanSession=true, ignoreProtectedModeSettings=true, ignoreZoomSetting=true, enab

mysql以`systemctl start mysqld.service`的方式启动一段时间后发现突然无法启动,尝试重新启动也不能解决问题,排查问题时,先后通过`systemctl status mysqld.service`和`journalctl -xe` 命令查看问题,无所得.然后查看`/var/log/mysqld.log`发现日志内报错信息如下: 2019-02-07T00:33:21.731341Z 0 [Note] InnoDB: Initializing buffer pool

Javassm连接数据库报错129 ERROR [com.alibaba.druid.pool.DruidDataSource] - {dataSource-1} init error 发现jdbc这个jar没有,居然忽略了.

今天启动mysql服务器时失败了.去/var/log/mysql/查看error.log,报错信息如下: 160123 22:29:26 InnoDB: Initializing buffer pool, size = 200.0M InnoDB: mmap(214630400 bytes) failed; errno 12160123 22:29:26 InnoDB: Completed initialization of buffer pool 160123 22:29:26 InnoDB:

报错信息:com.alibaba.druid.pool.DruidDataSource - testWhileIdle is true, validationQuery not set 解决方法: 找到conf/canal.properties 文件里面的 canal.instance.tsdb.spring.xml=classpath:spring/tsdb/h2-tsdb.xml 信息,给注释掉

使用SpringBoot做JAVA开发时,JDBC连接MySql数据库的时候遇到了报错: ERROR 10392 --- [ main] com.zaxxer.hikari.pool.HikariPool : HikariPool-1 - Exception during pool initialization. WARN 10392 --- [ main] o.s.b.a.orm.jpa.DatabaseLookup : Unable to determine jdbc url from da

在写爬取页面a标签下href属性的时候,有这样一个问题,如果a标签下没有href这个属性则会报错,如下: 百度了有师傅用正则匹配的,方法感觉都不怎么好,查了BeautifulSoup的官方文档,发现一个不错的方法,如下图: 官方文档链接:https://beautifulsoup.readthedocs.io/zh_CN/v4.4.0/ has_attr() 这个方法可以判断某标签是否存在某属性,如果存在则返回 True 解决办法: 为美观使用了匿名函数 soup_a = soup.find_a

redis log报错: [7666] 15 Jan 00:22:36.028 # Error moving temp DB file on the final destination: Invalid cross-device link [1937] 15 Jan 00:22:36.513 # Background saving error [1937] 15 Jan 00:22:36.614 * 1 changes in 900 seconds. Saving... [7679] 15 Ja

在平时和开发的交流 以及 在论坛回答问题的或称中会发现这个问题被问及的频率非常高. 程序中报错: MySQL server has gone away 是什么意思? 如何避免? 因此,感觉有必要总结一下发生这个问题的原因.今天正好看到一篇外文blog总结的比较好,就翻译过来了 原文:http://ronaldbradford.com/blog/sqlstatehy000-general-error-2006-mysql-server-has-gone-away-2013-01-02/ 原因1.

R 安装sparklyr,ggplot2等包出现如下warning package '****' is not available (for R version 3.0.2) 系统环境 ubuntu14.04 上述问题纠结了我很久,尝试过自己安装packages.zip包,出现了版本不对的报错 this R is version 3.0.2, package 'ggplot2' requires R >= 3.1 于是考虑到升级系统,猜测可能是底层依赖以及R的版本过低,于是运行如下命令在我的电脑

周一,开发反馈weblogic 12c下jxls导出excel报错,公司环境和UAT环境均报错,看日志如下: 2016-06-08 09:16:55,825 ERROR org.jxls.util.TransformerFactory.createTransformer(TransformerFactory.java:40)[org.jxls.util.TransformerFactory] - Method createTransformer of org.jxls.transform.poi

spring3.2.8 + quartz2.2.1配置到application.xml中 org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'startQuertz' defined in class path resource [application.xml]: Invocation of init method failed; nested exception is

redis使用连接池报错解决redis使用十几小时就一直报异常 redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool at redis.clients.util.Pool.getResource(Pool.java:22) at com.derbysoft.jredis.longkeytest.BorrowObject.run(BorrowObject.jav

能实现写数据,但是报错. 出错信息: 十月 21, 2016 3:46:18 下午 org.hibernate.Version logVersionINFO: HHH000412: Hibernate Core {5.2.3.Final}十月 21, 2016 3:46:18 下午 org.hibernate.cfg.Environment <clinit>INFO: HHH000206: hibernate.properties not found十月 21, 2016 3:46:18 下午