【发布时间】：2019-05-01 00:00:00
【问题描述】：
今天早些时候，我访问了一个我最近启动的网站，页面上只是充满了一个又大又丑的jasperexception: java.io.filenotfoundexception: /opt/tomcat/webapps/root/web-inf/lib/jstl-1.2.jar (too many open files)。我检查了我的服务器日志和 tomcat 日志，它们充满了相同的错误。我增加了 tomcat 的最大打开文件限制作为保持站点运行的临时解决方案，但它很快又被填满了。我已经使用与此相同的方法启动了其他站点，并且以前从未遇到过此问题。这次我唯一不同的是使用 Mobirise 为前端制作基本布局，所以我不排除 Mobirise 使用的某些脚本可能是罪魁祸首。但是当我得到 tomcat 已打开的文件列表时，我看到它打开了数百个 tomcat-users.xml 副本，而且它一直在打开越来越多。
...
java 319 tomcat 935r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 936r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 937r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 938r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 939r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 940r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 941r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 942r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 943r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 944r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 945r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 946r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 947r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 948r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 949r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 950r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 951r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 952r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 953r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 954r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 955r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 956r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 957r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 958r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 959r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 960r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 961r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 962r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 963r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
java 319 tomcat 964r REG 253,1 2164 263714 /opt/tomcat/conf/tomcat-users.xml
...
我不明白它为什么这样做。我一直在调试，扫描我的代码，并在互联网上搜索 tomcat 不断打开太多文件的问题，但他们都只是说“增加最大文件限制”。他们都没有解决问题的根源，也没有提到关于 tomcat 只是无限打开单个文件的副本。
[编辑]：这是 FileNotFoundException 的完整堆栈跟踪：
28-Nov-2018 03:51:33.857 SEVERE [http-nio-8080-exec-5] org.apache.catalina.core.ApplicationDispatcher.invoke Servlet.service() for servlet [jsp] threw exception
java.io.FileNotFoundException: /opt/tomcat/webapps/ROOT/WEB-INF/lib/jstl-1.2.jar (Too many open files)
at java.util.zip.ZipFile.open(Native Method)
at java.util.zip.ZipFile.<init>(ZipFile.java:225)
at java.util.zip.ZipFile.<init>(ZipFile.java:155)
at java.util.jar.JarFile.<init>(JarFile.java:166)
at java.util.jar.JarFile.<init>(JarFile.java:130)
at org.apache.tomcat.util.compat.JreCompat.jarFileNewInstance(JreCompat.java:164)
at org.apache.tomcat.util.scan.JarFileUrlJar.<init>(JarFileUrlJar.java:65)
at org.apache.tomcat.util.scan.JarFactory.newInstance(JarFactory.java:49)
at org.apache.tomcat.util.descriptor.tld.TldResourcePath.openJar(TldResourcePath.java:134)
at org.apache.jasper.compiler.TagLibraryInfoImpl.<init>(TagLibraryInfoImpl.java:125)
at org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:431)
at org.apache.jasper.compiler.Parser.parseDirective(Parser.java:489)
at org.apache.jasper.compiler.Parser.parseElements(Parser.java:1445)
at org.apache.jasper.compiler.Parser.parse(Parser.java:144)
at org.apache.jasper.compiler.ParserController.doParse(ParserController.java:244)
at org.apache.jasper.compiler.ParserController.parse(ParserController.java:105)
at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:206)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:385)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:362)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:346)
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:603)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:400)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:386)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:330)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:712)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:459)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:384)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:312)
at kom.kitten.gingerpage.servlets.HomeServlet.doGet(HomeServlet.java:16)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at com.googlecode.objectify.ObjectifyFilter.doFilter(ObjectifyFilter.java:48)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:791)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1417)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
28-Nov-2018 03:51:33.859 SEVERE [http-nio-8080-exec-5] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [kom.kitten.gingerpage.servlets.HomeServlet] in conte$
java.io.FileNotFoundException: /opt/tomcat/webapps/ROOT/WEB-INF/lib/jstl-1.2.jar (Too many open files)
at java.util.zip.ZipFile.open(Native Method)
at java.util.zip.ZipFile.<init>(ZipFile.java:225)
at java.util.zip.ZipFile.<init>(ZipFile.java:155)
at java.util.jar.JarFile.<init>(JarFile.java:166)
at java.util.jar.JarFile.<init>(JarFile.java:130)
at org.apache.tomcat.util.compat.JreCompat.jarFileNewInstance(JreCompat.java:164)
at org.apache.tomcat.util.scan.JarFileUrlJar.<init>(JarFileUrlJar.java:65)
at org.apache.tomcat.util.scan.JarFactory.newInstance(JarFactory.java:49)
at org.apache.tomcat.util.descriptor.tld.TldResourcePath.openJar(TldResourcePath.java:134)
at org.apache.jasper.compiler.TagLibraryInfoImpl.<init>(TagLibraryInfoImpl.java:125)
at org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:431)
at org.apache.jasper.compiler.Parser.parseDirective(Parser.java:489)
at org.apache.jasper.compiler.Parser.parseElements(Parser.java:1445)
at org.apache.jasper.compiler.Parser.parse(Parser.java:144)
at org.apache.jasper.compiler.ParserController.doParse(ParserController.java:244)
at org.apache.jasper.compiler.ParserController.parse(ParserController.java:105)
at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:206)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:385)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:362)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:346)
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:603)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:400)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:386)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:330)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:712)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:459)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:384)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:312)
at kom.kitten.gingerpage.servlets.HomeServlet.doGet(HomeServlet.java:16)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at com.googlecode.objectify.ObjectifyFilter.doFilter(ObjectifyFilter.java:48)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:791)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1417)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
这是每次发生错误时它记录的相同堆栈跟踪（即每次有人尝试在网站上加载页面时，而在 tomcat 中打开的文件太多）
【问题讨论】：
-
你是对的——问题不在于“打开的文件太多”。 REAL 问题是“谁在打开它们 - 为什么？”问：有什么想法吗？建议：尝试获取堆栈跟踪，并将其复制到您的问题中。这可能有助于隔离罪魁祸首。
-
请出示相关代码。
-
@jww 我不知道我的应用程序中的哪些代码（如果有）是相关的，因为我不知道是什么原因造成的。我不认为我的代码是问题所在。我为这个站点写了很少的代码，它是一个非常基本的站点，而且我编写的代码是我以前使用过很多次并且从未遇到过这个问题的代码。如果是任何代码导致了这种情况，那将是 Mobirise 使用的代码中的某些内容，但它包含了整个库，手动筛选太多了。
-
我认为这里的问题还可以，但是您需要进行一些调试并显示相关代码。如果你不能，那么也许你应该将问题移至Super User 或Unix & Linux Stack Exchange。 Server Fault 可能是最合适的，但他们有“专业管理员”的要求。
-
嗨，凯特！我相信你不知道我们在这里的格式，但 SO 是一个问答网站。这意味着您的问题应该与您的答案分开。如果您愿意，请随时在下面添加您的答案。您还可以通过查看help center 获得有关我们网站如何运作的帮助。谢谢！