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$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:662)
有人可以解释为什么
Exception in thread "com.mchange.v2.async.ThreadPoolAsynchronousRunner$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。以及为什么它们产生java.lang.OutOfMemoryError：Java堆空间和NullPointerException。我该如何克服这些例外。
如果有人对此了解，请答复，因为这些异常在生产服务器上发生。
谢谢。
最佳答案
java.lang.OutOfMemoryError指示您某个地方存在内存泄漏。更好地检查您的源代码并摆脱内存不足的问题。
引发该错误后，您的系统处于完全未定义的状态。我不太在乎其他异常，因为无论如何您都必须重新启动tomcat。