I am trying to install Mercury 1.1 on a 32-bit Ubuntu 10.04 EBS-backed micro instance (from Canonical, as listed on the Alestic site). The last message after I entered the command:
sudo bcfg2 -vqed -p 'mercury-aws-ebs'
was:
< update-alternatives: using /usr/lib/jvm/java-6-openjdk/jre/lib/jexec to provide /usr/bin/jexec (jexec) in auto mode.
Write failed: Broken pipe
Google was no help. I'm wondering if it can be installed on a micro instance? (Note: there was a discussion of the micro instance on 9-11-10 but that seemed to be only about the economics not how well Mercury would run on a micro instance.)
And one more question:
What are your thoughts regarding Amazon RDS for mysql? Is it possible? Is it advisable/not advisable? Why?
PS Thanks for all your work on Pantheon/Mercury!
Comments
Broken Pipe
To answer my own question:
It seems that "broken pipe" is caused by a ssh timeout. This can be corrected by setting ServerAliveInterval and ServerAliveCountMax in /etc/ssh/ssh_config.
But I found that I was unable to reconnect, even after rebooting my local PC. So I rebooted the instance and after doing so I found a stack trace in the log file (see below). This leads me to doubt whether a micro instance can be used. I think I'll move on to a small instance instead.
[ 5868.315655] kernel BUG at /build/buildd/linux-ec2-2.6.32/arch/x86/mm/hypervisor.c:461!
[ 5868.315662] invalid opcode: 0000 [#1] SMP
[ 5868.315668] last sysfs file: /sys/kernel/uevent_seqnum
[ 5868.315673] Modules linked in: ipv6
[ 5868.315679]
[ 5868.315683] Pid: 19125, comm: java Not tainted (2.6.32-309-ec2 #18-Ubuntu)
[ 5868.315689] EIP: 0061:[] EFLAGS: 00210282 CPU: 0
[ 5868.315697] EIP is at T.567+0x150/0x180
[ 5868.315702] EAX: ffffffea EBX: dc5c3e70 ECX: 00000002 EDX: 00000000
[ 5868.315707] ESI: bf8ec000 EDI: 00000000 EBP: dc5c3ebc ESP: dc5c3e60
[ 5868.315712] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0069
[ 5868.315718] Process java (pid: 19125, ti=dc5c2000 task=dc55c230 task.ti=dc5c2000)
[ 5868.315723] Stack:
[ 5868.315726] c138c580 dc5c3ee0 80000000 00000061 0000000e 00000000 dc5ac000 bf8ec061
[ 5868.315737] <0> 80000000 00000000 00000000 00000040 00000001 ffffffea dc5c3ee0 00000001
[ 5868.315750] <0> 00000000 00007ff0 00000000 00000000 bf8ec001 00000000 c14e5000 dc5c3efc
[ 5868.315765] Call Trace:
[ 5868.315771] [] ? xen_l3_entry_update+0x12d/0x1b0
[ 5868.315779] [] ? pud_populate+0x9e/0xc0
[ 5868.315785] [] ? __pmd_alloc+0x99/0xa0
[ 5868.315791] [] ? handle_mm_fault+0x509/0x5b0
[ 5868.315797] [] ? do_munmap+0x23a/0x2d0
[ 5868.315805] [] ? do_page_fault+0x119/0x340
[ 5868.315810] [] ? do_page_fault+0x0/0x340
[ 5868.315816] [] ? error_code+0x3d/0x44
[ 5868.315821] Code: c3 64 a0 cc 60 6f c0 84 c0 75 28 8b 5d a8 b9 01 00 00 00 31 d2 be f0 7f 00 00 e8 3c 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
[ 5868.315882] EIP: [] T.567+0x150/0x180 SS:ESP 0069:dc5c3e60
[ 5868.315895] ---[ end trace e641a7096cede001 ]---
[ 7548.537120] BUG: soft lockup - CPU#0 stuck for 1565s! [java:19124]
[ 7548.537120] Modules linked in: ipv6
[ 7548.537120]
[ 7548.537120] Pid: 19124, comm: java Tainted: G D (2.6.32-309-ec2 #18-Ubuntu)
[ 7548.537120] EIP: 0061:[] EFLAGS: 00200246 CPU: 0
[ 7548.537120] EIP is at 0xc01013a7
[ 7548.537120] EAX: 00000000 EBX: 00000003 ECX: dc66be64 EDX: 00000008
[ 7548.537120] ESI: 00000015 EDI: dc66be74 EBP: dc66be80 ESP: dc66be60
[ 7548.537120] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0069
[ 7548.537120] CR0: 8005003b CR2: b77185d8 CR3: 00891000 CR4: 00000660
[ 7548.537120] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[ 7548.537120] DR6: ffff0ff0 DR7: 00000000
[ 7548.537120] Call Trace:
[ 7548.537120] [] ? xen_poll_irq+0x7d/0xc0
[ 7548.537120] [] xen_spin_wait+0x6a/0x130
[ 7548.537120] [] _spin_lock+0x4d/0x60
[ 7548.537120] [] _pin_lock+0x1da/0x210
[ 7548.537120] [] ? cpumask_next_and+0x1f/0x40
[ 7548.537120] [] ? smp_call_function_many+0x4f/0x1e0
[ 7548.537120] [] mm_unpin+0x19/0x30
[ 7548.537120] [] arch_exit_mmap+0x78/0x80
[ 7548.537120] [] exit_mmap+0x2f/0x190
[ 7548.537120] [] ? mm_release+0xc5/0xe0
[ 7548.537120] [] mmput+0x26/0xd0
[ 7548.537120] [] exit_mm+0xe6/0x120
[ 7548.537120] [] ? tty_audit_exit+0x28/0xe0
[ 7548.537120] [] do_exit+0xfb/0x300
[ 7548.537120] [] do_group_exit+0x3d/0xe0
[ 7548.537120] [] sys_exit_group+0x13/0x20
[ 7548.537120] [] syscall_call+0x7/0xb
= = = = =
The "BUG: soft lockup" group of messages (prefixed by "[ 7548.537120]" above) then repeat several times.