分析

  1. 测试环境应用运行发生了异常，OutOfMemoryError:Java heap space 估计是内存溢出不够了。但是却又有特别的异常信息.
  2. 出现OOM问题一般主要是申请资源不够，申请资源太多，资源耗尽
  3. 常见原因：内存太小了，但应用确实需要大量内存；对象被申请却没有释放，导致内存不断泄漏；资源被频繁申请，资源耗尽
  4. 命令：jmap -heap 10765 查看内存情况 （服务进程:PID 10765）
  5. 命令：jmap -histo:live 10765 | more 找出最耗内存的对象

日志文件

tomcat.catlina.out文件如下:

  1. # java.lang.OutOfMemoryError: Java heap space
  2. # -XX:OnOutOfMemoryError="sh oom.sh %p /data/project/lml-web/tomcat/bin"
  3. # Executing /bin/sh -c "sh oom.sh 8892 /data/project/lml-web/tomcat/bin"...
  4. 内存溢出.....
  5. 20180412_112653
  6. name=/data/project/lml-web/tomcat/bin&ip=10.132.171.145&time=2018-04-12 11:26:53&pid=8892
  7. Attaching to process ID 8892, please wait...
  8. Attaching to process ID 8892, please wait...
  9. Error attaching to process: sun.jvm.hotspot.debugger.DebuggerException: Can't attach to the process
  10.   % Total % Received % Xferd Average Speed Time Time Time Current
  11.                                  Dload Upload Total Spent Left Speed
  12.   0 15 0 15 0 0 34 0 --:--:-- --:--:-- --:--:-- 0
  14. OK
  15. Debugger attached successfully.
  16. Server compiler detected.
  17. JVM version is 24.65-b04
  18. sun.jvm.hotspot.debugger.UnalignedAddressException: 11
  19.         at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1.checkAlignment(LinuxDebuggerLocal.java:181)
  20.         at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.readCInteger(LinuxDebuggerLocal.java:480)
  21.         at sun.jvm.hotspot.debugger.DebuggerBase.readCompOopAddressValue(DebuggerBase.java:459)
  22.         at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.readCompOopHandle(LinuxDebuggerLocal.java:442)
  23.         at sun.jvm.hotspot.debugger.linux.LinuxAddress.getCompOopHandleAt(LinuxAddress.java:125)
  24.         at sun.jvm.hotspot.oops.Oop.getKlassForOopHandle(Oop.java:231)
  25.         at sun.jvm.hotspot.oops.ObjectHeap.newOop(ObjectHeap.java:380)
  26.         at sun.jvm.hotspot.runtime.JavaThread.getThreadObj(JavaThread.java:331)
  27.         at sun.jvm.hotspot.runtime.JavaThread.getCurrentParkBlocker(JavaThread.java:383)
  28.         at sun.jvm.hotspot.runtime.DeadlockDetector.print(DeadlockDetector.java:82)
  29.         at sun.jvm.hotspot.runtime.DeadlockDetector.print(DeadlockDetector.java:39)
  30.         at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:52)
  31.         at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:45)
  32.         at sun.jvm.hotspot.tools.JStack.run(JStack.java:60)
  33.         at sun.jvm.hotspot.tools.Tool.start(Tool.java:221)
  34.         at sun.jvm.hotspot.tools.JStack.main(JStack.java:86)
  35.         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  36.         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
  37.         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  38.         at java.lang.reflect.Method.invoke(Method.java:606)
  39.         at sun.tools.jstack.JStack.runJStackTool(JStack.java:136)
  40.         at sun.tools.jstack.JStack.main(JStack.java:102)
  41. sun.jvm.hotspot.debugger.UnmappedAddressException: b42a0508
  42.         at sun.jvm.hotspot.debugger.PageCache.checkPage(PageCache.java:208)
  43.         at sun.jvm.hotspot.debugger.PageCache.getData(PageCache.java:63)
  44.         at sun.jvm.hotspot.debugger.DebuggerBase.readBytes(DebuggerBase.java:217)
  45.         at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.readCInteger(LinuxDebuggerLocal.java:482)
  46.         at sun.jvm.hotspot.debugger.DebuggerBase.readCompOopAddressValue(DebuggerBase.java:459)
  47.         at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.readCompOopHandle(LinuxDebuggerLocal.java:442)
  48.         at sun.jvm.hotspot.debugger.linux.LinuxAddress.getCompOopHandleAt(LinuxAddress.java:125)
  49.         at sun.jvm.hotspot.oops.Oop.getKlassForOopHandle(Oop.java:231)
  50.         at sun.jvm.hotspot.oops.ObjectHeap.newOop(ObjectHeap.java:380)
  51.         at sun.jvm.hotspot.runtime.JavaThread.getThreadObj(JavaThread.java:331)
  52.         at sun.jvm.hotspot.runtime.JavaThread.getCurrentParkBlocker(JavaThread.java:383)
  53.         at sun.jvm.hotspot.runtime.DeadlockDetector.print(DeadlockDetector.java:82)
  54.         at sun.jvm.hotspot.runtime.DeadlockDetector.print(DeadlockDetector.java:39)
  55.         at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:52)
  56.         at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:45)
  57.         at sun.jvm.hotspot.tools.JStack.run(JStack.java:60)
  58.         at sun.jvm.hotspot.tools.Tool.start(Tool.java:221)
  59.         at sun.jvm.hotspot.tools.JStack.main(JStack.java:86)
  60.         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  61.         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
  62.         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  63.         at java.lang.reflect.Method.invoke(Method.java:606)
  64.         at sun.tools.jstack.JStack.runJStackTool(JStack.java:136)
  65.         at sun.tools.jstack.JStack.main(JStack.java:102)
  66. sun.jvm.hotspot.debugger.UnalignedAddressException: 29
  67.         at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1.checkAlignment(LinuxDebuggerLocal.java:181)
  68.         at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.readCInteger(LinuxDebuggerLocal.java:480)
  69.         at sun.jvm.hotspot.debugger.DebuggerBase.readCompOopAddressValue(DebuggerBase.java:459)
  70.         at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.readCompOopHandle(LinuxDebuggerLocal.java:442)
  71.         at sun.jvm.hotspot.debugger.linux.LinuxAddress.getCompOopHandleAt(LinuxAddress.java:125)
  72.         at sun.jvm.hotspot.oops.Oop.getKlassForOopHandle(Oop.java:231)
  73.         at sun.jvm.hotspot.oops.ObjectHeap.newOop(ObjectHeap.java:356)
  74.         at sun.jvm.hotspot.oops.NarrowOopField.getValue(NarrowOopField.java:44)
  75.         at sun.jvm.hotspot.oops.OopUtilities.threadOopGetParkBlocker(OopUtilities.java:294)
  76.         at sun.jvm.hotspot.runtime.JavaThread.getCurrentParkBlocker(JavaThread.java:385)
  77.         at sun.jvm.hotspot.runtime.DeadlockDetector.print(DeadlockDetector.java:82)
  78.         at sun.jvm.hotspot.runtime.DeadlockDetector.print(DeadlockDetector.java:39)
  79.         at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:52)
  80.         at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:45)
  81.         at sun.jvm.hotspot.tools.JStack.run(JStack.java:60)
  82.         at sun.jvm.hotspot.tools.Tool.start(Tool.java:221)
  83.         at sun.jvm.hotspot.tools.JStack.main(JStack.java:86)
  84.         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  85.         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
  86.         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  87.         at java.lang.reflect.Method.invoke(Method.java:606)
  88.         at sun.tools.jstack.JStack.runJStackTool(JStack.java:136)
  89.         at sun.tools.jstack.JStack.main(JStack.java:102)