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[Scott Moser <smoser@xxxxxxxxxx>]

Matt, I suspect you are correct that this is the same issue hit another way.
I also suspect that if we had a tiny C test case that illustrated the issue (which I've never gone after) we'd have a much better likelyhood of finding a guest or host level work around.  However, I think most parties involved have just accepted that the hypervisor level fix is what is necessary, and that due to it only (largely) affecting java on t1.micro (which is not a terribly useful scenario for cpu anda memory issues).

There is no public amazon issue that I am aware of.

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

Title:
  t1.micro instance hangs when installing java

Status in Release Notes for Ubuntu:
  Fix Released
Status in “linux” package in Ubuntu:
  Confirmed
Status in “linux-ec2” package in Ubuntu:
  Invalid
Status in “openjdk-6” package in Ubuntu:
  Invalid
Status in “sun-java6” package in Ubuntu:
  Invalid
Status in “linux” source package in Lucid:
  Invalid
Status in “linux-ec2” source package in Lucid:
  Confirmed
Status in “openjdk-6” source package in Lucid:
  Invalid
Status in “sun-java6” source package in Lucid:
  Invalid
Status in “linux” source package in Maverick:
  Confirmed
Status in “linux-ec2” source package in Maverick:
  Invalid
Status in “openjdk-6” source package in Maverick:
  Invalid
Status in “sun-java6” source package in Maverick:
  Invalid
Status in “linux” source package in Natty:
  Confirmed
Status in “linux-ec2” source package in Natty:
  Invalid
Status in “openjdk-6” source package in Natty:
  Invalid
Status in “sun-java6” source package in Natty:
  Invalid
Status in “openjdk-6” package in Debian:
  New

Bug description:
  Binary package hint: cloud-init

  I booted the 32bit EBS lucid AMI (ami-1234de7b) for a t1.micro
  instance. I attempted to install Sun Java. The instance hung during
  the install. Repros every time. Only repros on t1.micro instances. I
  tried adding swap in case it was an out-of-memory condition, and it
  still repro'd. No reboots or anything else like that were involved so
  it's not the same issue as #634102

  Console log snippet (full one attached):

  [  525.195499] ------------[ cut here ]------------
  [  525.195515] kernel BUG at /build/buildd/linux-ec2-2.6.32/arch/x86/mm/hypervisor.c:461!
  [  525.195522] invalid opcode: 0000 [#1] SMP 
  [  525.195527] last sysfs file: /sys/kernel/uevent_seqnum
  [  525.195531] Modules linked in: ipv6
  [  525.195537] 
  [  525.195541] Pid: 8663, comm: java Not tainted (2.6.32-308-ec2 #15-Ubuntu) 
  [  525.195545] EIP: 0061:[<c0118550>] EFLAGS: 00010282 CPU: 0
  [  525.195553] EIP is at T.566+0x150/0x180
  [  525.195557] EAX: ffffffea EBX: c1f17e70 ECX: 00000002 EDX: 00000000
  [  525.195561] ESI: 0d537000 EDI: 00000004 EBP: c1f17ebc ESP: c1f17e60
  [  525.195565]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0069
  [  525.195580] Process java (pid: 8663, ti=c1f16000 task=e5373200 task.ti=c1f16000)
  [  525.195588] Stack:
  [  525.195591]  c103a020 c1f17ee0 80000000 00000061 0000000e 00000000 c1c81000 0d537061
  [  525.195603] <0> 80000004 00000000 00000000 00000040 00000001 ffffffea c1f17ee0 00000001
  [  525.195617] <0> 00000000 00007ff0 00000000 00000000 0d537001 00000004 c14e5000 c1f17efc
  [  525.195632] Call Trace:
  [  525.195640]  [<c01188dd>] ? xen_l3_entry_update+0x12d/0x1b0
  [  525.195647]  [<c01145de>] ? pud_populate+0x9e/0xc0
  [  525.195654]  [<c01aed59>] ? __pmd_alloc+0x99/0xa0
  [  525.195659]  [<c01b2eb9>] ? handle_mm_fault+0x509/0x5b0
  [  525.195665]  [<c01b7b2a>] ? do_munmap+0x22a/0x2b0
  [  525.195672]  [<c05370f9>] ? do_page_fault+0x119/0x340
  [  525.195677]  [<c0536fe0>] ? do_page_fault+0x0/0x340
  [  525.195683]  [<c0535525>] ? error_code+0x3d/0x44
  [  525.195687] Code: c3 64 a0 cc 40 6f c0 84 c0 75 28 8b 5d a8 b9 01 00 00 00 31 d2 be f0 7f 00 00 e8 dc 8a fe ff 85 c0 79 d6 0f 0b eb fe 8d 74 26 00 <0f> 0b eb fe 0f 0b eb fe 8b 45 a8 31 c9 ba 01 00 00 00 c7 04 24 
  [  525.195754] EIP: [<c0118550>] T.566+0x150/0x180 SS:ESP 0069:c1f17e60
  [  525.195769] ---[ end trace 9706b235d81a7968 ]---

  
  Script which can 100% repro the problem:

  #!/bin/bash

  export DEBIAN_FRONTEND=noninteractive
  add-apt-repository "deb http://archive.canonical.com/ lucid partner"
  apt-get update
  echo 'sun-java6-bin   shared/accepted-sun-dlj-v1-1    boolean true
  sun-java6-jdk   shared/accepted-sun-dlj-v1-1    boolean true
  sun-java6-jre   shared/accepted-sun-dlj-v1-1    boolean true
  sun-java6-jre   sun-java6-jre/stopthread        boolean true
  sun-java6-jre   sun-java6-jre/jcepolicy note
  sun-java6-bin   shared/present-sun-dlj-v1-1     note
  sun-java6-jdk   shared/present-sun-dlj-v1-1     note
  sun-java6-jre   shared/present-sun-dlj-v1-1     note
  '|debconf-set-selections
  apt-get -y install sun-java6-jdk

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