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[ugtar <934001@xxxxxxxxxxxxxxxxxx>]

I am seeing the same problem with a home grown application running on
Oracle's jvm:

$ java -version
java version "1.7.0_03"
Java(TM) SE Runtime Environment (build 1.7.0_03-b04)
Java HotSpot(TM) 64-Bit Server VM (build 22.1-b02, mixed mode)

Would this bug affect jvm's other than openjdk (the reporter of this bug
and both duplicates are using openjdk 1.6)?

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https://bugs.launchpad.net/bugs/934001

Title:
  java assert failure: java: ../../src/xcb_io.c:178:
  dequeue_pending_request: Assertion `!xcb_xlib_unknown_req_in_deq'
  failed.

Status in “openjdk-6” package in Ubuntu:
  Confirmed

Bug description:
  Until this afternoon's updates, Netbeans 7.1 has been working fine.
  After dist-upgrade and reboot, netbeans crashes at the splash screen
  (showing "loading modules...") with xcb error.

  ProblemType: Crash
  DistroRelease: Ubuntu 12.04
  Package: openjdk-6-jre-headless 6b24-1.11.1-0ubuntu1
  ProcVersionSignature: Ubuntu 3.2.0-16.25-generic 3.2.6
  Uname: Linux 3.2.0-16-generic x86_64
  ApportVersion: 1.91-0ubuntu1
  Architecture: amd64
  AssertionMessage: java: ../../src/xcb_io.c:178: dequeue_pending_request: Assertion `!xcb_xlib_unknown_req_in_deq' failed.
  CrashCounter: 1
  Date: Thu Feb 16 22:44:54 2012
  EcryptfsInUse: Yes
  ExecutablePath: /usr/lib/jvm/java-6-openjdk-amd64/jre/bin/java
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111011)
  ProcCmdline: /usr/lib/jvm/default-java/bin/java -Djdk.home=/usr/lib/jvm/default-java -classpath /home/username/netbeans-7.1/platform/lib/boot.jar:/home/username/netbeans-7.1/platform/lib/org-openide-modules.jar:/home/username/netbeans-7.1/platform/lib/org-openide-util.jar:/home/username/netbeans-7.1/platform/lib/org-openide-util-lookup.jar:/home/username/netbeans-7.1/platform/lib/locale/boot_ja.jar:/home/username/netbeans-7.1/platform/lib/locale/boot_pt_BR.jar:/home/username/netbeans-7.1/platform/lib/locale/boot_ru.jar:/home/username/netbeans-7.1/platform/lib/locale/boot_zh_CN.jar:/home/username/netbeans-7.1/platform/lib/locale/org-openide-modules_ja.jar:/home/username/netbeans-7.1/platform/lib/locale/org-openide-modules_pt_BR.jar:/home/username/netbeans-7.1/platform/lib/locale/org-openide-modules_ru.jar:/home/username/netbeans-7.1/platform/lib/locale/org-openide-modules_zh_CN.jar:/home/username/netbeans-7.1/platform/lib/locale/org-openide-util_ja.jar:/home/username/netbeans-7.1/platform/lib/locale/org-openide-util-lookup_ja.jar:/home/username/netbeans-7.1/platform/lib/locale/org-openide-util-lookup_pt_BR.jar:/home/username/netbeans-7.1/platform/lib/locale/org-openide-util-lookup_ru.jar:/home/username/netbeans-7.1/platform/lib/locale/org-openide-util-lookup_zh_CN.jar:/home/username/netbeans-7.1/platform/lib/locale/org-openide-util_pt_BR.jar:/home/username/netbeans-7.1/platform/lib/locale/org-openide-util_ru.jar:/home/username/netbeans-7.1/platform/lib/locale/org-openide-util_zh_CN.jar:/usr/lib/jvm/default-java/lib/dt.jar:/usr/lib/jvm/default-java/lib/tools.jar -Dnetbeans.system_http_proxy=DIRECT -Dnetbeans.system_http_non_proxy_hosts= -Dnetbeans.dirs=/home/username/netbeans-7.1/nb:./netbeans-7.1/bin/../ergonomics:/home/username/netbeans-7.1/ide:./netbeans-7.1/bin/../java:./netbeans-7.1/bin/../apisupport:./netbeans-7.1/bin/../webcommon:/home/username/netbeans-7.1/websvccommon:./netbeans-7.1/bin/../enterprise:./netbeans-7.1/bin/../mobility:./netbeans-7.1/bin/../profiler:./netbeans-7.1/bin/../python:/home/username/netbeans-7.1/php:./netbeans-7.1/bin/../identity:./netbeans-7.1/bin/../harness:./netbeans-7.1/bin/../cnd:./netbeans-7.1/bin/../dlight:./netbeans-7.1/bin/../groovy:./netbeans-7.1/bin/../extra:./netbeans-7.1/bin/../javacard:./netbeans-7.1/bin/../javafx: -Dnetbeans.home=/home/username/netbeans-7.1/platform -Dnetbeans.importclass=org.netbeans.upgrade.AutoUpgrade -Dnetbeans.accept_license_class=org.netbeans.license.AcceptLicense -XX:MaxPermSize=384m -Xmx768m -client -Xss2m -Xms32m -XX:PermSize=32m -Dapple.laf.useScreenMenuBar=true -Dapple.awt.graphics.UseQuartz=true -Dsun.java2d.noddraw=true -Dsun.zip.disableMemoryMapping=true -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/home/username/.netbeans/7.1/var/log/heapdump.hprof org.netbeans.Main --userdir /home/username/.netbeans/7.1 --branding nb
  ProcEnviron:
   SHELL=/bin/bash
   PATH=(custom, no user)
   LANG=en_US.UTF-8
  Signal: 6
  SourcePackage: openjdk-6
  StacktraceTop:
   __assert_fail_base (fmt=<optimized out>, assertion=0x7f6453d7bda5 "!xcb_xlib_unknown_req_in_deq", file=0x7f6453d7bd92 "../../src/xcb_io.c", line=<optimized out>, function=<optimized out>) at assert.c:94
   __GI___assert_fail (assertion=0x7f6453d7bda5 "!xcb_xlib_unknown_req_in_deq", file=0x7f6453d7bd92 "../../src/xcb_io.c", line=178, function=0x7f6453d7bea0 "dequeue_pending_request") at assert.c:103
   ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6
   ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6
   _XEventsQueued () from /usr/lib/x86_64-linux-gnu/libX11.so.6
  Title: java assert failure: java: ../../src/xcb_io.c:178: dequeue_pending_request: Assertion `!xcb_xlib_unknown_req_in_deq' failed.
  UpgradeStatus: Upgraded to precise on 2011-12-19 (59 days ago)
  UserGroups: adm admin cdrom dialout libvirtd lpadmin plugdev sambashare

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