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Unexpected Signal : 11

 
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We are currently developing an application on a Sun Ultra 5 server, Solaris 8 operating system, JDK1.4.2_04-b05 and Perl version 5.8.4.

The application uses JPL to allow Java to execute some functions within a perl API and return the results. After a fixed number of calls between Java and Perl the following error occurs and the application core dumps. Any help with this matter would be greatly appreciated.

Stephen

Unexpected Signal : 11 occurred at PC=0xFE0EE000
Function=[Unknown. Nearest: JVM_IsSupportedJNIVersion+0x984]
Library=/usr/j2se/jre/lib/sparc/client/libjvm.so

Current Java thread:
at JPLINManagerDebug.retreiveRecords(Native Method)
at CTPMultipleTest.main(CTPMultipleTest.java:85)

Dynamic libraries:
0x10000 java
0xff360000 /usr/lib/libthread.so.1
0xff3a0000 /usr/lib/libdl.so.1
0xff200000 /usr/lib/libc.so.1
0xff330000 /usr/platform/SUNW,Ultra-5_10/lib/libc_psr.so.1
0xfe000000 /usr/j2se/jre/lib/sparc/client/libjvm.so
0xff2e0000 /usr/lib/libCrun.so.1
0xff1e0000 /usr/lib/libsocket.so.1
0xff100000 /usr/lib/libnsl.so.1
0xff0d0000 /usr/lib/libm.so.1
0xff1c0000 /usr/lib/libsched.so.1
0xff310000 /usr/lib/libw.so.1
0xff0a0000 /usr/lib/libmp.so.2
0xff070000 /usr/j2se/jre/lib/sparc/native_threads/libhpi.so
0xff020000 /usr/j2se/jre/lib/sparc/libverify.so
0xfe7c0000 /usr/j2se/jre/lib/sparc/libjava.so
0xfe790000 /usr/j2se/jre/lib/sparc/libzip.so
0xfe730000 /usr/lib/locale/en_US.ISO8859-1/en_US.ISO8859-1.so.2
0xfddc0000 /export/home/sb/SXIAPI/Prototype/JPLINManagerDebug/libJPLINManagerDebug.so
0xf1280000 /usr/local/lib/perl5/5.8.4/sun4-solaris/CORE/libperl.so
0xfc3e0000 /usr/jpl/lib/sun4-solaris/libPerlInterpreter.so
0xfc3a0000 /usr/local/lib/perl5/site_perl/5.8.4/sun4-solaris/auto/JNI/JNI.so
0xf1180000 /usr/j2se/jre/lib/sparc/libawt.so
0xfc180000 /usr/j2se/jre/lib/sparc/libmlib_image.so
0xfc2e0000 /usr/local/lib/perl5/5.8.4/sun4-solaris/auto/Socket/Socket.so
0xfc2c0000 /usr/local/lib/perl5/5.8.4/sun4-solaris/auto/Sys/Hostname/Hostname.so
0xfc2a0000 /usr/local/lib/perl5/5.8.4/sun4-solaris/auto/Cwd/Cwd.so
0xfc160000 /usr/local/lib/perl5/site_perl/5.8.4/sun4-solaris/auto/SVRQ/SVRQ.so
0xfbbe0000 /usr/lib/nss_files.so.1

Heap at VM Abort:
Heap
def new generation total 2112K, used 130K [0xf1400000, 0xf1620000, 0xf1b10000)
eden space 2048K, 6% used [0xf1400000, 0xf1420b88, 0xf1600000)
from space 64K, 0% used [0xf1600000, 0xf1600000, 0xf1610000)
to space 64K, 0% used [0xf1610000, 0xf1610000, 0xf1620000)
tenured generation total 1408K, used 0K [0xf1b10000, 0xf1c70000, 0xf5400000)
the space 1408K, 0% used [0xf1b10000, 0xf1b10000, 0xf1b10200, 0xf1c70000)
compacting perm gen total 4096K, used 964K [0xf5400000, 0xf5800000, 0xf9400000)
the space 4096K, 23% used [0xf5400000, 0xf54f13f0, 0xf54f1400, 0xf5800000)

Local Time = Thu Aug 12 14:20:34 2004
Elapsed Time = 2
#
# HotSpot Virtual Machine Error : 11
# Error ID : 4F530E43505002EF 01
# Please report this error at
# http://java.sun.com/cgi-bin/bugreport.cgi
#
# Java VM: Java HotSpot(TM) Client VM (1.4.2_04-b05 mixed mode)
#
# An error report file has been saved as hs_err_pid3319.log.
# Please refer to the file for further information.
#
Abort(coredump)
 
author and iconoclast
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Hi,

Welcome to JavaRanch!

Well, it's either a bug in the implementation of the native method JPLINManagerDebug.retreiveRecords, or it's a bug in some other native method, or it's a JVM bug. I'd investigate these three in that order.

Make sure the native code checks for errors and/or exceptions after every JNI call; if you continue after getting such an error, the behavior can be undefined. Remember, this is C, so dereferencing a null pointer can get you a Sig11, rather than the nice neat NullPointerException you'll get in Java.
 
Stephen Burns
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Thanks Ernest,

Managed to isolate the problem and it only seems to occur when passing an array of Objects back from the Native code. Have managed a work-around by passing delimited strings instead. Would still be interested in knowing the cause of the problem, if anyone has any suggestions.

Thanks again

Stephen.
 
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It couldn't be the JVM's attempt to throw an:

 
Stephen Burns
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Thanks Juliet,

Managed to find the error when stepping through the stack trace, see below

$ pstack core
core 'core' of 4247: java -Xcheck:jni -verbose:jni JPLStubbTestCaller
----------------- lwp# 1 / thread# 1 --------------------
ff3791f0 __sigprocmask (ff37b7f4, 0, 0, 29130, ff38c000, 0) + 8
ff36dd0c _sigon (29130, ff3938a8, 6, ffbedbfc, 29130, ff39321c) + d0
ff370d4c _thrp_kill (0, 1, 6, ff38c000, 1, ff2c0458) + f8
ff24bce0 raise (6, 0, 0, ffffffff, ff2c03c4, ff3931fc) + 40
ff235984 abort (ff2bc008, ffbedd50, 0, fffffff8, 4, ffbedd71) + 100
fe33987c __1cCosFabort6Fi_v_ (1, fe3d15ca, ffbede00, fe3fa000, fe40f908, 35e820) + 80
fe337974 __1cCosbBhandle_unexpected_exception6FpnGThread_ipCpv_v_ (2cde0, a, fe0ee000, ffbeeb38, a,
0) + 2cc
fe33d7e8 JVM_handle_solaris_signal (fe0ee000, ffbeeb38, ffbee880, 3400, 3558, 0) + 8a4
ff37b118 __sighndlr (a, ffbeeb38, ffbee880, fe33b2f4, 291d8, 291c8) + c
ff37811c sigacthandler (a, 29130, 0, 0, 0, ff38c000) + 708
-- JNI exception raised (java.lang.yourNoFunnyBawbag)

 
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