Too many open files in tomcat catalina.err

[golden3]

I have an application running on tomcat and sometimes in centos 6.8 & I have the error below facing .

Mar 28, 2017 10:46:27 AM org.apache.catalina.core.ApplicationContext log
SEVERE: Failed to locate resource [/WEB-INF/web.xml] in context []
java.io.FileNotFoundException: /home/user123/public_html/WEB-INF/web.xml (Too many open files)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:146)
at org.apache.naming.resources.FileDirContext$FileResource.streamContent(FileDirContext.java:900)
at org.apache.catalina.core.ApplicationContext.getResourceAsStream(ApplicationContext.java:581)
at org.apache.catalina.core.ApplicationContextFacade.getResourceAsStream(ApplicationContextFacade.java:212)
at org.apache.catalina.startup.ContextConfig.getContextWebXmlSource(ContextConfig.java:1782)
at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1251)
at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:878)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:376)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5322)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.StandardContext.reload(StandardContext.java:3954)
at org.apache.catalina.loader.WebappLoader.backgroundProcess(WebappLoader.java:426)
at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1345)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1530)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1540)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1540)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1519)
at java.lang.Thread.run(Thread.java:745)

[TrevorH]

Use limits.conf (or a file in limits.d) to adjust the limit.

[aks]

... of the user that tomcat runs as.

[golden3]

@TrevorH

ulimit adjustment is universal , If we change it might be affect server performance, so my question 'ulimit' is a only solution to avoid the issue either any dependency of API related issue (Apache / Tomcat) .Also it was running tomcat on it .

[TrevorH]

ulimit is done by user and/or group.

[golden3]

@TrevorH So you are recommending to increase an ulimit ? right

[TrevorH]

If you are hitting the number of open files limit then your only alternatives are to amend your config so that it opens less files or to increase the limit.