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From: sandect <chencs...@gmail.com>
Date: Tue, 9 Oct 2012 17:33:19 -0700 (PDT)
Local: Tues, Oct 9 2012 8:33 pm
Subject: DataFileSync too long cause host crashed?
We set up a mongod on a vps, and sometimes it crashed. In the log Oct 10 02:34:55 localhost kernel: INFO: task mongod:1696 blocked for more > than 120 seconds. and, in mongod.log, we got > Oct 10 02:34:55 localhost kernel: "echo 0 > > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > Oct 10 02:34:55 localhost kernel: mongod D 0000000000000000 0 > 1696 1 0x00000080 > Oct 10 02:34:55 localhost kernel: ffff88003b24fca8 0000000000000086 > ffff8800375be938 ffff8800375be848 > Oct 10 02:34:55 localhost kernel: ffff880037710e60 ffff880037710e60 > 0000000000000cc1 0000000000000005 > Oct 10 02:34:55 localhost kernel: ffff880037553ab8 ffff88003b24ffd8 > 000000000000fb88 ffff880037553ab8 > Oct 10 02:34:55 localhost kernel: Call Trace: > Oct 10 02:34:55 localhost kernel: [<ffffffff81258a38>] ? > __make_request+0x168/0x5a0 > Oct 10 02:34:55 localhost kernel: [<ffffffff814fe925>] > schedule_timeout+0x215/0x2e0 > Oct 10 02:34:55 localhost kernel: [<ffffffff8125700e>] ? > generic_make_request+0x25e/0x530 > Oct 10 02:34:55 localhost kernel: [<ffffffff81116ad5>] ? > mempool_alloc_slab+0x15/0x20 > Oct 10 02:34:55 localhost kernel: [<ffffffff814fe5a3>] > wait_for_common+0x123/0x180 > Oct 10 02:34:55 localhost kernel: [<ffffffff81060250>] ? > default_wake_function+0x0/0x20 > Oct 10 02:34:55 localhost kernel: [<ffffffff8125736d>] ? > submit_bio+0x8d/0x120 > Oct 10 02:34:55 localhost kernel: [<ffffffff814fe6bd>] > wait_for_completion+0x1d/0x20 > Oct 10 02:34:55 localhost kernel: [<ffffffff8125a99d>] > __blkdev_issue_flush+0xad/0xe0 > Oct 10 02:34:55 localhost kernel: [<ffffffff8125a9e6>] > blkdev_issue_flush+0x16/0x20 > Oct 10 02:34:55 localhost kernel: [<ffffffffa0288441>] > ext4_sync_file+0x191/0x260 [ext4] > Oct 10 02:34:55 localhost kernel: [<ffffffff811aa221>] > vfs_fsync_range+0xa1/0xe0 > Oct 10 02:34:55 localhost kernel: [<ffffffff811aa2cd>] vfs_fsync+0x1d/0x20 > Oct 10 02:34:55 localhost kernel: [<ffffffff81148161>] > sys_msync+0x151/0x1e0 > Oct 10 02:34:55 localhost kernel: [<ffffffff8100b0f2>] > system_call_fastpath+0x16/0x1b > Oct 10 02:36:55 localhost kernel: INFO: task scsi_eh_0:282 blocked for > more than 120 seconds. > Oct 10 02:36:55 localhost kernel: "echo 0 > > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > Oct 10 02:36:55 localhost kernel: scsi_eh_0 D 0000000000000000 0 > 282 2 0x00000000 > Oct 10 02:36:55 localhost kernel: ffff8800377afd10 0000000000000046 > 0000000000000000 0000000000001388 > Oct 10 02:36:55 localhost kernel: ffff8800377afd00 ffffffff814fe5cc > ffff880037a21540 0000000000000000 Wed Oct 10 02:38:16 [DataFileSync] flushing mmaps took 800120ms for 3 files > Wed Oct 10 02:51:32 [DataFileSync] flushing mmaps took 795015ms for 3 Any thing will be helpful. Thank you. > files You must Sign in before you can post messages.
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