我已经安装了JDK 8并尝试运行Eclipse.我收到以下警告信息:
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=512m;
support was removed in 8.0
忽视这个论点的原因是什么？
我遇到了这个错误,其中CPU使用率达到极限,JBoss需要重启(java.lang.OutOfMemoryError: PermGen space).
我发现旧的JBoss版本的解决方案可以增加MaxPermSize.我想JBoss7也是如此.
为了不再遇到任何问题,哪个值足够好？有没有办法永久远离这个问题(比如让我们说使用像JRockit这样的其他虚拟机)？
我们正在运行grails,我们注意到需要多个完整的垃圾收集来清除permgen空间.
2013-06-06T16:11:27.016+0000: 32582.145: [Full GC 32582.145: [CMS2013-06-06T16:11:45.404+0000: 32600.532: [CMS-concurrent-mark: 21.403/86.063 secs] [Times: user=48.44 sys=0.63, real=86.07 secs]
(concurrent mode failure): 7585874K->7290466K(10145024K), 57.9230770 secs] 7866094K->7290466K(10451712K), [CMS Perm : 261766K->261702K(262144K)] icms_dc=30 , 57.9232150 secs] [Times: user=57.97 sys=0.00, real=57.93 secs]
2013-06-06T16:12:25.183+0000: 32640.311: [GC [1 CMS-initial-mark: 7290466K(10145024K)] 7385976K(10451712K), 0.0880890 secs] [Times: user=0.09 sys=0.00, real=0.08 secs]
2013-06-06T16:12:25.271+0000: 32640.400: [CMS-concurrent-mark-start]
2013-06-06T16:12:25.427+0000: 32640.555: [GC 32640.556: [ParNew: 272640K->10006K(306688K), 0.0622620 secs] 7563106K->7300472K(10451712K) icms_dc=30 , 0.0624140 secs] [Times: user=0.24 sys=0.00, real=0.06 secs]
2013-06-06T16:12:25.734+0000: 32640.863: [GC 32640.863: [ParNew: 282646K->13476K(306688K), 0.0648770 secs] 7573112K->7303942K(10451712K) …我不知道我的java进程发生了什么.此过程是索引过程.它从一组zip文件中读取文档,并将它们添加到lucene索引中.GC日志显示它正在连续运行Full GC.
4959.569: [Full GC 19960K->19960K(10617856K), 0.1648590 secs]
4959.764: [Full GC 19960K->19960K(10617856K), 0.1650240 secs]
4959.959: [Full GC 19960K->19960K(10617856K), 0.1649380 secs]
4960.154: [Full GC 19960K->19960K(10617856K), 0.1650000 secs]
4960.350: [Full GC 19960K->19960K(10617856K), 0.1648900 secs]
至于我可以解释这些线条,前后对象的大小大约是19M,但为什么它一直在运行呢？
线程转储如下所示:
........[Unloading class sun.reflect.GeneratedConstructorAccessor1]
[Unloading class sun.reflect.GeneratedConstructorAccessor2]
[Unloading class sun.reflect.GeneratedConstructorAccessor3]
2012-01-13 12:55:24
Full thread dump Java HotSpot(TM) 64-Bit Server VM (20.4-b02 mixed mode):
"org.cxv.CXVIndexer.main()" prio=10 tid=0x00007f4540474000 nid=0x4b15 waiting on condition [0x00007f453f5ed000]
java.lang.Thread.State: RUNNABLE
at org.apache.lucene.index.DocFieldProcessorPerThread.abort(DocFieldProcessorPerThread.java:72)
at org.apache.lucene.index.DocumentsWriter.abort(DocumentsWriter.java:424)
- locked <0x000000034ab44fb8> (a org.apache.lucene.index.DocumentsWriter)
at org.apache.lucene.index.DocumentsWriter.flush(DocumentsWriter.java:659)
- locked <0x000000034ab44fb8> …