Question

获取NullPointerException

我收到了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)

有人可以解释原因吗

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

并且

  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。他们为什么要生成java.lang.OutOfMemoryError：Java堆空间和NullPointerException。我怎样才能克服这些异常。如果有人知道这一点，请回复，因为这些例外发生在prod服务器上。谢谢。

Answer 1

java.lang.OutOfMemoryError指示某个地方有内存泄漏。更好地检查您的源代码并摆脱内存不足的问题。

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你必须重启tomcat。

Answer 2

使用-XX:+HeapDumpOnOutOfMemoryError启动JVM。这将在生成OutOfMemoryError时生成堆转储。

之后检查这个以分析转储： http://www.vogella.com/articles/EclipseMemoryAnalyzer/article.html

由com.mchange.v2.async.ThreadPoolAsynchronousRunner $ PoolThread-＃5生成的NullPointerException

2 个答案: