`c->xlib.lock' failed error on Java applications
Ubuntu, JavaI am currently using the Alpha 3 release of Ubuntu 8.04 Hardy Heron. Considering the fact that it is an alpha release, I tend to not get worked up over little errors that might occur. However, I have found one that I just couldn't get around. I use Aqua Data Studio for my database client and since loading Hardy Heron, I have been unable to run it.
When I would start it from a terminal, I would get a dump that looked like this:
#0 /usr/lib/libxcb-xlib.so.0 [0x90d00767] #1 /usr/lib/libxcb-xlib.so.0(xcb_xlib_unlock+0x31) [0x90d008b1] #2 /usr/lib/libX11.so.6(_XReply+0xfd) [0x9039429d] #3 /usr/lib/jvm/java-6-sun-1.6.0.04/jre/lib/i386/xawt/libmawt.so [0x9063e8ce] #4 /usr/lib/jvm/java-6-sun-1.6.0.04/jre/lib/i386/xawt/libmawt.so [0x9061b067] #5 /usr/lib/jvm/java-6-sun-1.6.0.04/jre/lib/i386/xawt/libmawt.so [0x9061b318] #6 /usr/lib/jvm/java-6-sun-1.6.0.04/jre/lib/i386/xawt/libmawt.so(Java_sun_awt_X11GraphicsEnvironment_initDisplay+0x2f) [0x9061b61f] #7 [0xb4cff3aa] #8 [0xb4cf7f0d] #9 [0xb4cf7f0d] #10 [0xb4cf5249] #11 /usr/lib/jvm/java-6-sun-1.6.0.04/jre/lib/i386/server/libjvm.so [0x637338d] #12 /usr/lib/jvm/java-6-sun-1.6.0.04/jre/lib/i386/server/libjvm.so [0x64fd168] #13 /usr/lib/jvm/java-6-sun-1.6.0.04/jre/lib/i386/server/libjvm.so [0x6373220] #14 /usr/lib/jvm/java-6-sun-1.6.0.04/jre/lib/i386/server/libjvm.so(JVM_DoPrivileged+0x363) [0x63c90d3] #15 /usr/lib/jvm/java-6-sun-1.6.0.04/jre/lib/i386/libjava.so(Java_java_security_AccessController_doPrivileged__Ljava_security_PrivilegedAction_2+0x3d) [0xb7d1096d] #16 [0xb4cff3aa] #17 [0xb4cf7da7] #18 [0xb4cf5249] #19 /usr/lib/jvm/java-6-sun-1.6.0.04/jre/lib/i386/server/libjvm.so [0x637338d] java: xcb_xlib.c:82: xcb_xlib_unlock: Assertion `c->xlib.lock' failed. Aborted (core dumped)
Considering the fact that I used the Ubuntu sun-java6-jdk package from the Ubuntu repository, I decided that I would try the self-extracting bin that is available on http://java.sun.com. After swapping to that JVM, I still received the same dump and abort. After doing a bit of searching, I came across a patch in one of the bug reporting forums that effectively patches your JVM and prevents this error from occurring. I ran the patch and now everything works as it should. If you are receiving this error, create a shell script with the following content and run it. Assuming that it runs successfully, you should then be able to open the Java application that was failing.
#!/bin/sh # S. Correia # 2007 11 21 # A simple script to patch the java library in order # to solve the problem with "Assertion 'c->xlib.lock' failed." # see bug http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6532373 LIB_TO_PATCH=libmawt.so for f in `find /usr/lib/jvm -name "$LIB_TO_PATCH"` do echo "Patching library $f" sudo sed -i 's/XINERAMA/FAKEEXTN/g' "$f" done
Big thanks to "S. Correia" for getting me back on my feet!
jgraham said:
Thanks a bunch for posting this. I've been hitting my head for over an hour. Who said that running alpha was a bad idea?
Starhawk said:
Great job here. I didn't have this problem but found this post helping someone on the Ubuntu forums trying to get frostwire working. You saved me alot of work and it worked like a charm :)
Damien Joldersma said:
Thank you! This helped me very much, I couldn't run DbVisualizer either on Hardy Heron.
Vijaymateti said:
Hi that really saved my day. Me too using ubuntu 8.04 alpha3 and i tried to install netbeans on it and it throws exactly same error.
Thanks for the patch.
Thanks for the patch.
robline said:
Just another thanks to throw into the chorus. a simple sh javapatch.sh and I'm off to the races.
jjoshi said:
thanks for the patch. my netbeans stopped working today giving me this error. the patch fixed it.
Sam said:
Thanks, Dave, for the brilliant guide. Helped me fix the problem on Fedora 8 / JRE 1.6 (NetBeans pack), with minor modifications derived out of common sense. Keep up the good work. Cheers !
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