The customer often experience a JVM crash issue. Full HotSpot logs attached to this bug report.

The log file doesn't show a HotSpot issue, this is a JDK issue.
Some parts of the log file:

# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0xff380700, pid=583, tid=3156104
#
# JRE version: 6.0_16-b01
# Java VM: Java HotSpot(TM) Server VM (14.2-b01 mixed mode solaris-sparc )
# Problematic frame:
# C [libc_psr.so.1+0x700] memcpy+0x2f8
...
--------------- T H R E A D ---------------

Current thread (0x00746400): JavaThread "p: default-threadpool; w: Idle" daemon [_thread_in_native, id=3156104, stack(0xb0c00000,0xb0c80000)]

siginfo:si_signo=SIGSEGV: si_errno=0, si_code=1 (SEGV_MAPERR), si_addr=0xfe0cc000

Registers:
 O0=0xfe0cbfc0 O1=0x00000000 O2=0xc3230063 O3=0x6f727465
 O4=0x6d612f67 O5=0x70726f63 O6=0xb0c7c890 O7=0xfe202378
 G1=0x00054000 G2=0x00c4f5d0 G3=0x00000000 G4=0xff140000
 G5=0x03785238 G6=0x00000000 G7=0xb7314200 Y=0x00000000
 PC=0xff380700 nPC=0xff380704


Top of Stack: (sp=0xb0c7c890)
0xb0c7c890: fe0c77d2 00000008 00000065 00007200
0xb0c7c8a0: 00000072 96898d9b ffffffff 00000000
0xb0c7c8b0: 03789a00 fe0cbfc0 0000002c 00001d80
0xb0c7c8c0: ff3303a8 00000000 b0c7c8f0 fe20d194
0xb0c7c8d0: 00c4f5e4 00000000 00000001 00000000
0xb0c7c8e0: 00000000 00000000 00000001 00c4f608
0xb0c7c8f0: fe0c77d2 00000076 00000065 00007200
0xb0c7c900: 00000072 96898d9b ffffffff 00000000

Instructions: (pc=0xff380700)
0xff3806f0: d8 5e 60 30 da 5e 60 38 d6 f6 20 20 d8 f6 20 28
0xff380700: d4 5e 60 40 d6 5e 60 48 da f6 20 30 d4 f6 20 38

Stack: [0xb0c00000,0xb0c80000], sp=0xb0c7c890, free space=498k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C [libc_psr.so.1+0x700] memcpy+0x2f8
C [libzip.so+0xd19c]
C [libzip.so+0x2380] ZIP_GetEntry+0xe4
C [libzip.so+0x2800] Java_java_util_zip_ZipFile_getEntry+0xc4
j java.util.zip.ZipFile.getEntry(JLjava/lang/String;Z)J+0
j java.util.zip.ZipFile.getEntry(JLjava/lang/String;Z)J+0
j java.util.zip.ZipFile.getEntry(Ljava/lang/String;)Ljava/util/zip/ZipEntry;+31
j java.util.jar.JarFile.getEntry(Ljava/lang/String;)Ljava/util/zip/ZipEntry;+2
j java.util.jar.JarFile.getJarEntry(Ljava/lang/String;)Ljava/util/jar/JarEntry;+2
...