【发布时间】：2013-12-27 04:41:26
【问题描述】：
WebSphere JVM 在执行负载测试时崩溃并生成 .dmp、.txt 和 .trc 文件。
环境详情：
硬件： 架构 x86_64
64 位 CPU 操作模式
CPU 5
内存 16 GB
操作系统： 操作系统 Red Hat Enterprise Linux Server 5.6 (Tikanga)
内核 2.6.18-238.el5
文件限制 8000
最大用户进程数 1024
WebSphere WebSphere 版本 7.0.0.19
初始堆大小 2048 MB
最大堆大小 4096 MB
通用 JVM 参数 -XX:+HeapDumpOnOutOfMemoryError -XX:MaxPermSize=1024m -XX:+CMSClassUnloadingEnabled -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintHeapAtGC -Djavax.management.builder.initial= -Dcom.sun .management.jmxremote -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.port=1099
最少数据库连接数 1
最大数据库连接数 180
数据库连接超时 180
最小 Web 容器线程大小 50
最小 Web 容器线程大小 75
JVM 详细信息
NULL ------------------------------------------------------------------------
0SECTION ENVINFO subcomponent dump routine
NULL =================================
1CIJAVAVERSION J2RE 6.0 IBM J9 2.4 Linux amd64-64 build jvmxa6460-20080816_22093
1CIVMVERSION VM build 20080816_022093_LHdSMr
1CIJITVERSION JIT enabled, AOT enabled - r9_20080721_1330ifx2
1CIGCVERSION GC - 20080724_AA_CMPRSS
1CIRUNNINGAS Running as a standalone JVM
下面是GC的快照
<af type="nursery" id="21" timestamp="Dec 23 19:47:03 2013" intervalms="8681.336">
<minimum requested_bytes="1160" />
<time exclusiveaccessms="0.025" meanexclusiveaccessms="0.025" threads="0" lastthreadtid="0x00000000029DF700" />
<refs soft="37815" weak="31295" phantom="1064" dynamicSoftReferenceThreshold="28" maxSoftReferenceThreshold="32" />
<nursery freebytes="0" totalbytes="502379520" percent="0" />
<tenured freebytes="1445056240" totalbytes="1610612736" percent="89" >
<soa freebytes="1445056240" totalbytes="1610612736" percent="89" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<gc type="scavenger" id="21" totalid="39" intervalms="8695.837">
<flipped objectcount="772517" bytes="49361504" />
<tenured objectcount="0" bytes="0" />
<finalization objectsqueued="397" />
<scavenger tiltratio="82" />
<nursery freebytes="466161688" totalbytes="516178944" percent="90" tenureage="10" />
<tenured freebytes="1445056240" totalbytes="1610612736" percent="89" >
<soa freebytes="1445056240" totalbytes="1610612736" percent="89" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<time totalms="37.615" />
</gc>
<nursery freebytes="466160528" totalbytes="516178944" percent="90" />
<tenured freebytes="1445056240" totalbytes="1610612736" percent="89" >
<soa freebytes="1445056240" totalbytes="1610612736" percent="89" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<refs soft="37598" weak="14193" phantom="1064" dynamicSoftReferenceThreshold="28" maxSoftReferenceThreshold="32" />
<time totalms="57.603" />
</af>
<con event="kickoff" timestamp="Dec 23 19:47:03 2013">
<kickoff reason="Unloading of classes requested" />
<stats tenurefreebytes="1445056240" nurseryfreebytes="466094992" tracetarget="65473953" kickoff="9082810" />
</con>
Unhandled exception
Type=Segmentation error vmState=0x00000000
J9Generic_Signal_Number=00000004 Signal_Number=0000000b Error_Value=00000000 Signal_Code=00000001
Handler1=00007F5FD09EC780 Handler2=00007F5FD06AFF20 InaccessibleAddress=0000000000000020
RDI=00007F5FCC077980 RSI=000000000157DDA0 RAX=00007F5FBF6F1300 RBX=0000000000000000
RCX=0000000000001555 RDX=00007F5FBF6F1300 R8=00007F5F1E227E80 R9=0000000000000000
R10=0000000000000384 R11=00000001E1979348 R12=00007F5FCC077980 R13=0000000000000000
R14=00007F5F1E227E80 R15=000000000157DDA0
RIP=00007F5FC5F738E9 GS=0006000000000000 FS=0000000600000000 RSP=00007F5FBC2F67E0
EFlags=0000000000210206 CS=0000000000000033 RBP=00007F5FBF6F1300 ERR=0000000000000006
TRAPNO=000000000000000E OLDMASK=0000000000000000 CR2=0000000000000020
xmm0 0000000000000000 (f: 0.000000, d: 0.000000e+00)
xmm1 0000000040800000 (f: 1082130432.000000, d: 5.346435e-315)
xmm2 0000000000000000 (f: 0.000000, d: 0.000000e+00)
xmm3 00ff000000000000 (f: 0.000000, d: 7.063274e-304)
xmm4 0000000000000000 (f: 0.000000, d: 0.000000e+00)
xmm5 00007f5fb42807a0 (f: 3022522368.000000, d: 6.919341e-310)
xmm6 00007f5fd0b4cca0 (f: 3501509888.000000, d: 6.919365e-310)
xmm7 000000000002010c (f: 131340.000000, d: 6.489058e-319)
xmm8 4350e0198eaee000 (f: 2393825280.000000, d: 1.900000e+16)
xmm9 4024000000000000 (f: 0.000000, d: 1.000000e+01)
xmm10 4297fffffffffd2c (f: 4294966528.000000, d: 6.597070e+12)
xmm11 3e90affee0cce3d1 (f: 3771524096.000000, d: 2.486629e-07)
xmm12 0000000000000000 (f: 0.000000, d: 0.000000e+00)
xmm13 0000000000000000 (f: 0.000000, d: 0.000000e+00)
xmm14 0000000000000000 (f: 0.000000, d: 0.000000e+00)
xmm15 0000000000000000 (f: 0.000000, d: 0.000000e+00)
Module=/home0/was7/IBM/WebSphere/AppServer/java/jre/lib/amd64/compressedrefs/libj9jit24.so
Module_base_address=00007F5FC5BC9000
Target=2_40_20080816_022093_LHdSMr (Linux 2.6.32-71.el6.x86_64)
CPU=amd64 (5 logical CPUs) (0x3ed11e000 RAM)
----------- Stack Backtrace -----------
在网上搜索发现这个链接
http://www-01.ibm.com/support/docview.wss?uid=swg21499624
这表示问题可能是由于页面缓存，但 WAS 版本与上面链接中提到的不同。在这方面需要一些帮助。
谢谢。
【问题讨论】：
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这听起来像是 JVM 缺陷。我建议更新到最新的修订包级别。如果问题仍然存在，我建议向 IBM 开一个 PMR。
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感谢@bkail 更新 JVM 后问题已解决。
标签： java websphere-7 jvm-crash rhel5