I am running ubuntu 14.04 as guest inside virtualbox 5.0.3 on OS X. While performing rsync on a glusterfs (3.7.x) mounted share with over 100.000 files, the entire machine crashes.
There is one particular /var/log/syslog entry of interest:
INFO: task rsync:4114 blocked for more than 120 seconds.
Aug 24 20:39:15 localhost kernel: [ 8974.340183] Not tainted 3.19.0-25-generic #26~14.04.1-Ubuntu
Aug 24 20:39:15 localhost kernel: [ 8974.340381] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Aug 24 20:39:15 localhost kernel: [ 8974.340513] rsync D ffff8800d87e7e08 0 4114 4104 0x00000000
Aug 24 20:39:15 localhost kernel: [ 8974.340518] ffff8800d87e7e08 ffff8800da169d70 0000000000013e80 ffff8800d87e7fd8
Aug 24 20:39:15 localhost kernel: [ 8974.340521] 0000000000013e80 ffff8800da31c4b0 ffff8800da169d70 ffff8800d87e7e18
Aug 24 20:39:15 localhost kernel: [ 8974.340523] ffff8800db6555e0 ffff8800d9558800 ffff8800d87e7e30 ffff8800db6556b0
Aug 24 20:39:15 localhost kernel: [ 8974.340526] Call Trace:
Aug 24 20:39:15 localhost kernel: [ 8974.340534] [<ffffffff817b22e9>] schedule+0x29/0x70
Aug 24 20:39:15 localhost kernel: [ 8974.340538] [<ffffffff812dc06d>] __fuse_request_send+0x11d/0x290
Aug 24 20:39:15 localhost kernel: [ 8974.340542] [<ffffffff810b4e10>] ? prepare_to_wait_event+0x110/0x110
Aug 24 20:39:15 localhost kernel: [ 8974.340545] [<ffffffff812dc1f2>] fuse_request_send+0x12/0x20
Aug 24 20:39:15 localhost kernel: [ 8974.340548] [<ffffffff812e576d>] fuse_flush+0x12d/0x180
Aug 24 20:39:15 localhost kernel: [ 8974.340551] [<ffffffff811e9973>] filp_close+0x33/0x80
Aug 24 20:39:15 localhost kernel: [ 8974.340554] [<ffffffff8120a152>] __close_fd+0x82/0xa0
Aug 24 20:39:15 localhost kernel: [ 8974.340556] [<ffffffff811e99e3>] SyS_close+0x23/0x50
Aug 24 20:39:15 localhost kernel: [ 8974.340560] [<ffffffff817b668d>] system_call_fastpath+0x16/0x1b
What could be the potential cause of this and how could I prevent this from happening again?
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