ListeningIOReactor 遇到检查异常:打开的文件太多 [英] ListeningIOReactor encountered a checked exception : Too many open files

问题描述

我们在 WSO2 ESB 4.9.0 中遇到了一个奇怪的问题，错误如下.启动服务器后，服务器响应但不接受任何 http 请求.下面是错误.我们只是在测试 20-50 个请求...

We are facing a strange issue in WSO2 ESB 4.9.0 with below error. After we start the server, server is respondin but it's not accepting any http requests. Below is the error. We are just testing 20-50 reqeusts...

2016-06-17 13:13:15,330 [-] [PassThrough HTTP-Listener I/O dispatcher Listener]  WARN PassThroughHttpListener System may be unstable: HTTP ListeningIOReactor encountered a checked exception : Too many open files
java.io.IOException: Too many open files
at sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method)
at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:241)
at org.apache.http.impl.nio.reactor.DefaultListeningIOReactor.processEvent(DefaultListeningIOReactor.java:170)
at org.apache.http.impl.nio.reactor.DefaultListeningIOReactor.processEvents(DefaultListeningIOReactor.java:153)
at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor.execute(AbstractMultiworkerIOReactor.java:349)
at org.apache.synapse.transport.passthru.core.PassThroughListeningIOReactorManager$1.run(PassThroughListeningIOReactorManager.java:506)
at java.lang.Thread.run(Thread.java:745

推荐答案

尽量增加文件句柄数&解决上述问题的最大允许打开文件描述符数.

检查文件句柄和当前使用的最大数量cat/proc/sys/fs/file-nr

Check for the maximum number of file handle and currently in use cat /proc/sys/fs/file-nr

将其更改为 WSO2 推荐的值(可以根据情况更改)sysctl -w fs.file-max=65536

Change it to a value recommended by WSO2 (can change case to case) sysctl -w fs.file-max=65536

对于打开的文件描述符ulimit -n

要更改此限制，请编辑/etc/security/limits.conf 文件

* 软文件 4096* 硬文件 65535

完整列表请参考https://docs.wso2.com/display/ESB490/Network+and+OS+Level+Performance+Tuning

For a comprehensive list, please refer https://docs.wso2.com/display/ESB490/Network+and+OS+Level+Performance+Tuning

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