java - 由 com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#5 产生的 NullPointerException

Question

获取 NullPointerException

我收到 NullPointerException

Exception in thread "com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#5" java.lang.OutOfMemoryError: Java heap space
Exception in thread "http-8080-150" java.lang.NullPointerException
Exception in thread "http-8080-148" 
at  java.util.concurrent.ConcurrentLinkedQueue.offer(ConcurrentLinkedQueue.java:273)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler$1.offer(Http11Protocol.java:537)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler$1.offer(Http11Protocol.java:554)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:618)
Exception in thread "http-8080-149" 
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:662)
java.lang.NullPointerException
at java.util.concurrent.ConcurrentLinkedQueue.offer(ConcurrentLinkedQueue.java:273)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler$1.offer(Http11Protocol.java:537)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler$1.offer(Http11Protocol.java:554)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:618)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:662)
java.lang.NullPointerException
at java.util.concurrent.ConcurrentLinkedQueue.offer(ConcurrentLinkedQueue.java:273)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler$1.offer(Http11Protocol.java:537)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler$1.offer(Http11Protocol.java:554)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:618)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:662)
Nov 26, 2013 19:26:57 -0500 NewRelic 7 WARN: Unexpected exception detecting dead threads: java.lang.OutOfMemoryError: Java heap space
 Exception in thread "http-8080-178" java.lang.NullPointerException
at java.util.concurrent.ConcurrentLinkedQueue.offer(ConcurrentLinkedQueue.java:273)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler$1.offer(Http11Protocol.java:537)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler$1.offer(Http11Protocol.java:554)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:618)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:662)
Exception in thread "http-8080-179" java.lang.NullPointerException
at java.util.concurrent.ConcurrentLinkedQueue.offer(ConcurrentLinkedQueue.java:273)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler$1.offer(Http11Protocol.java:537)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler$1.offer(Http11Protocol.java:554)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:618)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:662)

谁能解释一下原因

Exception in thread "com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#5" java.lang.OutOfMemoryError: Java heap space

和

  Exception in thread "http-8080-149"   at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:662)

正在发生。以及它们产生 java.lang.OutOfMemoryError: Java heap space 和 NullPointerException 的原因。我怎样才能克服这些异常。 如果有人知道这一点，请回复，因为这些异常发生在生产服务器上。 谢谢。

Answer 1

java.lang.OutOfMemoryError 表示某处存在内存泄漏。最好检查您的源代码并摆脱内存不足的问题。

在抛出该错误后，您的系统处于完全未定义的状态。我不太关心其他异常，因为无论如何您都必须重新启动 tomcat。