我们正在研究客户的生产服务器堆以检测和解决内存泄漏。为此,我们定期使用 jmap 来收集必要的信息。
但上周我们无法进行转储,因为它触发了 EOF 错误并关闭了 Tomcat 实例。
我在互联网上搜索但找不到有关此错误的任何具体信息。我们发现它仅在使用时发生Gc First
垃圾收集器算法。
这是我们用来执行 jmap 的命令行:
jmap -dump:format=b,file=heap.bin <PID>
服务器上的 Java 版本:JDK 1.7.0_7 x64
有人已经遇到过这种错误吗?可能缺少某些配置或需要 java/jmap 补丁。
UPDATE
我们收集了有关此错误的更多信息:
[root]# jmap -dump:format=b,file=heap.bin 7806
Dumping heap to /tmp/heap.bin ...
Exception in thread "main" java.io.IOException: Premature EOF
at sun.tools.attach.HotSpotVirtualMachine.readInt(HotSpotVirtualMachine.java:244)
at sun.tools.attach.LinuxVirtualMachine.execute(LinuxVirtualMachine.java:193)
at sun.tools.attach.HotSpotVirtualMachine.executeCommand(HotSpotVirtualMachine.java:213)
at sun.tools.attach.HotSpotVirtualMachine.dumpHeap(HotSpotVirtualMachine.java:180)
at sun.tools.jmap.JMap.dump(JMap.java:241)
at sun.tools.jmap.JMap.main(JMap.java:140)
[root]#
Note:目标目录有超过500GB的可用空间
错误输出到catalina.out(JVM转储错误):
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007f0269cc41c6, pid=7806, tid=139647231129360
#
# JRE version: Java(TM) SE Runtime Environment (7.0_40-b43) (build 1.7.0_40-b43)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (24.0-b56 mixed mode linux-amd64 compressed oops)
# Problematic frame:
# V [libjvm.so+0x58c1c6] DumperSupport::dump_field_value(DumpWriter*, char, unsigned char*)+0x1c6
#
# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
#
# An error report file with more information is saved as:
# /opt/tomcat6/bin/hs_err_pid7806.log
#
# If you would like to submit a bug report, please visit:
# http://bugreport.sun.com/bugreport/crash.jsp