I had the same problem on a hardy amd64 hardy dom0 running xen 3.2 and
kernel 2.6.24-21-xen. When I tried to install sun-java6-jdk on an i386
lucid domU.

I can confirm that the xen patch mentioned by Stefan in comment 58
solved my problem.

Before patching, the installation of sun-java6-bin crashed reliably, and
calling 'dpkg --configure -a' showed this:

-----
Setting up sun-java6-bin (6.21dlj-0ubuntu1~lucid1~ppa1) ...
update-alternatives: using /usr/lib/jvm/java-6-sun/jre/bin/ControlPanel to 
provide /usr/bin/ControlPanel (ControlPanel) in auto mode.
...
update-alternatives: using /usr/lib/jvm/java-6-sun/jre/lib/jexec to provide 
/usr/bin/jexec (jexec) in auto mode.
[   51.946179] ------------[ cut here ]------------
[   51.946188] kernel BUG at 
/build/buildd/linux-ec2-2.6.32/arch/x86/mm/hypervisor.c:461!
[   51.946192] invalid opcode: 0000 [#1] SMP 
[   51.946197] last sysfs file: /sys/kernel/uevent_seqnum
[   51.946200] Modules linked in: ipv6
[   51.946204] 
[   51.946208] Pid: 836, comm: java Not tainted (2.6.32-317-ec2 #36-Ubuntu) 
[   51.946211] EIP: 0061:[<c01184c0>] EFLAGS: 00010282 CPU: 0
[   51.946217] EIP is at T.571+0x150/0x180
[   51.946219] EAX: ffffffea EBX: e1dc3e70 ECX: 00000002 EDX: 00000000
[   51.946222] ESI: b70d8000 EDI: 00000003 EBP: e1dc3ebc ESP: e1dc3e60
[   51.946225]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0069
[   51.946228] Process java (pid: 836, ti=e1dc2000 task=e19f72f0 
task.ti=e1dc2000)
[   51.946231] Stack:
[   51.946233]  c1df9960 e1dc3ee0 80000000 00000061 0000000e 00000000 e1a4b000 
b70d8061
[   51.946243] <0> 80000003 00000000 00000000 00000040 00000001 ffffffea 
e1dc3ee0 00000001
[   51.946253] <0> 00000000 00007ff0 00000000 00000000 b70d8001 00000003 
c233a000 e1dc3efc
[   51.946265] Call Trace:
[   51.946271]  [<c011884d>] ? xen_l3_entry_update+0x12d/0x1b0
[   51.946276]  [<c011454e>] ? pud_populate+0x9e/0xc0
[   51.946281]  [<c01af189>] ? __pmd_alloc+0x99/0xa0
[   51.946285]  [<c01b35b9>] ? handle_mm_fault+0x509/0x5b0
[   51.946290]  [<c01b833a>] ? do_munmap+0x23a/0x2d0
[   51.946295]  [<c0537d59>] ? do_page_fault+0x119/0x340
[   51.946300]  [<c0537c40>] ? do_page_fault+0x0/0x340
[   51.946304]  [<c0536185>] ? error_code+0x3d/0x44
----

I applied the patch to the sources of xen-
hypervisor-3.2_3.2.0_amd64.deb, rebooted with the patched hypervisor and
the old dom0 kernel (2.6.24-21-xen).

The dpkg --configure step didn't crash the domU, and I can run tomcat6.
Up to now, there has been no heavy load on the instance. I'll report
back if I experience crashes.

Thank you, Stefan.

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https://bugs.launchpad.net/bugs/634487

Title:
  t1.micro instance hangs when installing java

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