jmap -heap not working after jvm upgrade
Hello,
Our production linux server was running jdk1.5.0_06 for several months (tomcat 55 servlet applications). We run jmap -heap on each jvm from a cron job throught the day to capture statistics.
Last night we upgraded to jdk1.5.0_11 and everything works fine except jmap. It sometimes attaches to the jvms, but about 80% of the time it just sits there after givin the "Attaching to process ID xxx, please wait..." message. It is using no CPU and just seems to sit there forever. Control-C will not stop it -- in fact, I have to do a kill -9 on the process.
I still have jdk1.5.0_06 on the box -- so I tried running the jmap exe from that version against my jvms that are running with 1.5.0_11 -- and it works every time.
Is anyone else having this kind of issue or know what could be causing it? Is there any kind of logging I can turn up or debugging that can be done on jmap itself? I went through the release notes for the versions between 06 and 11 -- and while the 10 build did do some things with jmap, it didn't seem relevant.
Thanks in advance,
Steve
[1107 byte] By [
ssyretta] at [2007-11-26 21:04:14]
# 2
Hey -- thanks for the reply. I've never used gdb before, but I gave it a shot. I started gdb used bt and got:
Attaching to program: /usr/java/jdk1.5.0_11/bin/jmap, process 20652
Reading symbols from /lib/libcwait.so...(no debugging symbols found)...done.
Loaded symbols for /lib/libcwait.so
Reading symbols from /lib/tls/libpthread.so.0...(no debugging symbols found)...done.
[Thread debugging using libthread_db enabled]
[New Thread -1208031552 (LWP 20652)]
[New Thread -1316586576 (LWP 20660)]
[New Thread -1306219600 (LWP 20659)]
[New Thread -1305691216 (LWP 20658)]
[New Thread -1305162832 (LWP 20657)]
[New Thread -1304634448 (LWP 20656)]
[New Thread -1302008912 (LWP 20655)]
[New Thread -1301480528 (LWP 20654)]
[New Thread -1300952144 (LWP 20653)]
Loaded symbols for /lib/tls/libpthread.so.0
Reading symbols from /lib/libdl.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/libdl.so.2
Reading symbols from /lib/tls/libc.so.6...
(no debugging symbols found)...done.
Loaded symbols for /lib/tls/libc.so.6
Reading symbols from /lib/ld-linux.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/ld-linux.so.2
Reading symbols from /usr/java/jdk1.5.0_11/jre/lib/i386/client/libjvm.so...(no debugging symbols found)...done.
Loaded symbols for /usr/java/jdk1.5.0_11/jre/lib/i386/client/libjvm.so
Reading symbols from /lib/tls/libm.so.6...
(no debugging symbols found)...done.
Loaded symbols for /lib/tls/libm.so.6
Reading symbols from /usr/java/jdk1.5.0_11/jre/lib/i386/native_threads/libhpi.so...(no debugging symbols found)...done.
Loaded symbols for /usr/java/jdk1.5.0_11/jre/lib/i386/native_threads/libhpi.so
Reading symbols from /lib/libnsl.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/libnsl.so.1
Reading symbols from /lib/libnss_files.so.2...
(no debugging symbols found)...done.
Loaded symbols for /lib/libnss_files.so.2
Reading symbols from /usr/java/jdk1.5.0_11/jre/lib/i386/libverify.so...(no debugging symbols found)...done.
Loaded symbols for /usr/java/jdk1.5.0_11/jre/lib/i386/libverify.so
Reading symbols from /usr/java/jdk1.5.0_11/jre/lib/i386/libjava.so...(no debugging symbols found)...done.
Loaded symbols for /usr/java/jdk1.5.0_11/jre/lib/i386/libjava.so
Reading symbols from /usr/java/jdk1.5.0_11/jre/lib/i386/libzip.so...
(no debugging symbols found)...done.
Loaded symbols for /usr/java/jdk1.5.0_11/jre/lib/i386/libzip.so
Reading symbols from /usr/java/jdk1.5.0_11/jre/lib/i386/libsaproc.so...(no debugging symbols found)...done.
Loaded symbols for /usr/java/jdk1.5.0_11/jre/lib/i386/libsaproc.so
Reading symbols from /lib/tls/libthread_db.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/tls/libthread_db.so.1
0x006637a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
(gdb) bt
#0 0x006637a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
#1 0x007edb26 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/libpthread.so.0
#2 0x007ee16e in pthread_cond_wait@GLIBC_2.0 () from /lib/tls/libpthread.so.0
#3 0xb7ad7cee in os::Linux::safe_cond_wait () from /usr/java/jdk1.5.0_11/jre/lib/i386/client/libjvm.so
#4 0xb7acdbbf in ObjectMonitor::wait () from /usr/java/jdk1.5.0_11/jre/lib/i386/client/libjvm.so
#5 0xb7b243b6 in ObjectSynchronizer::wait () from /usr/java/jdk1.5.0_11/jre/lib/i386/client/libjvm.so
#6 0xb7a1d143 in JVM_MonitorWait () from /usr/java/jdk1.5.0_11/jre/lib/i386/client/libjvm.so
#7 0xb286f4db in ? ()
#8 0x0805bb68 in ? ()
#9 0xbfffd220 in ? ()
#10 0x00000000 in ? ()
