java - Tomcat 崩溃并出现错误 java.lang.OutOfMemoryError : GC overhead limit exceeded

Question

tomcat跑了几个月后，没想到报如下错误。我们重新启动了 tomcat，错误现在没有出现，但将来可能会再次出现。我看到另一个用户有类似的异常，与垃圾收集有关，但与 NIO 连接器不完全相关。

有人知道为什么会发生这种情况吗？正确的解决方法应该是避免这种情况。

Jan 15, 2016 7:46:47 AM org.apache.tomcat.util.net.NioEndpoint$SocketProcessor run
SEVERE: 
java.lang.OutOfMemoryError: GC overhead limit exceeded
        at java.util.Collections.synchronizedSet(Collections.java:1691)
        at org.atmosphere.cpr.AtmosphereRequest$Builder.<init>(AtmosphereRequest.java:1146)
        at org.atmosphere.cpr.AtmosphereRequest.wrap(AtmosphereRequest.java:1891)
        at org.atmosphere.cpr.AtmosphereServlet.event(AtmosphereServlet.java:295)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilterEvent(ApplicationFilterChain.java:484)
        at org.apache.catalina.core.ApplicationFilterChain.doFilterEvent(ApplicationFilterChain.java:377)
        at org.apache.catalina.core.StandardWrapperValve.event(StandardWrapperValve.java:411)
        at org.apache.catalina.core.StandardContextValve.event(StandardContextValve.java:146)
        at org.apache.catalina.valves.ValveBase.event(ValveBase.java:224)
        at org.apache.catalina.core.StandardHostValve.event(StandardHostValve.java:256)
        at org.apache.catalina.valves.ValveBase.event(ValveBase.java:224)
        at org.apache.catalina.valves.ValveBase.event(ValveBase.java:224)
        at org.apache.catalina.core.StandardEngineValve.event(StandardEngineValve.java:138)
        at org.apache.catalina.connector.CoyoteAdapter.event(CoyoteAdapter.java:210)
        at org.apache.coyote.http11.Http11NioProcessor.event(Http11NioProcessor.java:124)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1690)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:744)

Answer 1

选项 1 CATALINA.BAT

如果您从以下 (Windows) 运行 Tomcat:

catalina.bat start

然后，您应该创建一个文件 setenv.bat 并添加以下行:

set JAVA_OPTS="-Xms4096m -Xmx4096m"

选项 2 CATALINA.SH

如果您从以下 (Linux) 运行 Tomcat:

catalina.sh start

然后，您必须做类似的事情并创建 setenv.sh 添加如下内容:

export JAVA_OPTS="-Xms4096m -Xmx4096m"

另见 Increase Tomcat memory settings

选项 3 TOMCAT 服务

如果您从使用 Tomcat 安装程序安装的 Windows 服务运行 Tomcat，请转到 Windows 命令提示符并运行类似这样的程序(这是针对 Tomcat 8 的，可以在类似 C:\Program Files\Apache Software Foundation\Tomcat 8.0\bin):

Tomcat8w.exe

在 Java 选项卡下，您将看到 Initial memory pool 和 Maximum memory pool。在两个字段中输入:

4096

点击应用和确定。

从任务管理器，服务选项卡，服务，选择Apache Tomcat并按开始

另见 Configure Tomcat as a service (no catalina.bat)和 https://plavc.wordpress.com/2012/02/08/tomcat-service-on-windows/