[Gluster-users] GlusterFS FUSE client hangs on rsyncing lots of file

[Oleksandr Natalenko]

Here is similar issue described on serverfault.com:

https://serverfault.com/questions/716410/rsync-crashes-machine-while-performing-sync-on-glusterfs-mounted-share

I've checked GlusterFS logs with no luck — as if nothing happened.

P.S. GlusterFS v3.7.6.

15.01.2016 09:40, Oleksandr Natalenko написав:
> While doing rsync over millions of files from ordinary partition to
> GlusterFS volume, just after approx. first 2 million rsync hang
> happens, and the following info appears in dmesg:
> 
> ===
> [17075038.924481] INFO: task rsync:10310 blocked for more than 120 
> seconds.
> [17075038.931948] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
> disables this message.
> [17075038.940748] rsync           D ffff88207fc13680     0 10310
> 10309 0x00000080
> [17075038.940752]  ffff8809c578be18 0000000000000086 ffff8809c578bfd8
> 0000000000013680
> [17075038.940756]  ffff8809c578bfd8 0000000000013680 ffff880310cbe660
> ffff881159d16a30
> [17075038.940759]  ffff881e3aa25800 ffff8809c578be48 ffff881159d16b10
> ffff88087d553980
> [17075038.940762] Call Trace:
> [17075038.940770]  [<ffffffff8160a1d9>] schedule+0x29/0x70
> [17075038.940797]  [<ffffffffa023a53d>] __fuse_request_send+0x13d/0x2c0 
> [fuse]
> [17075038.940801]  [<ffffffffa023db30>] ?
> fuse_get_req_nofail_nopages+0xc0/0x1e0 [fuse]
> [17075038.940805]  [<ffffffff81098350>] ? wake_up_bit+0x30/0x30
> [17075038.940809]  [<ffffffffa023a6d2>] fuse_request_send+0x12/0x20 
> [fuse]
> [17075038.940813]  [<ffffffffa024382f>] fuse_flush+0xff/0x150 [fuse]
> [17075038.940817]  [<ffffffff811c45c4>] filp_close+0x34/0x80
> [17075038.940821]  [<ffffffff811e4ed8>] __close_fd+0x78/0xa0
> [17075038.940824]  [<ffffffff811c6103>] SyS_close+0x23/0x50
> [17075038.940828]  [<ffffffff81614de9>] system_call_fastpath+0x16/0x1b
> ===
> 
> rsync blocks in D state, and to kill it, I have to do umount --lazy on
> GlusterFS mountpoint, and then kill corresponding client glusterfs
> process. Then rsync exits.
> 
> Here is GlusterFS volume info:
> 
> ===
> Volume Name: asterisk_records
> Type: Distributed-Replicate
> Volume ID: dc1fe561-fa3a-4f2e-8330-ec7e52c75ba4
> Status: Started
> Number of Bricks: 3 x 2 = 6
> Transport-type: tcp
> Bricks:
> Brick1:
> server1:/bricks/10_megaraid_0_3_9_x_0_4_3_hdd_r1_nolvm_hdd_storage_01/asterisk/records
> Brick2:
> server2:/bricks/10_megaraid_8_5_14_x_8_6_16_hdd_r1_nolvm_hdd_storage_01/asterisk/records
> Brick3:
> server1:/bricks/11_megaraid_0_5_4_x_0_6_5_hdd_r1_nolvm_hdd_storage_02/asterisk/records
> Brick4:
> server2:/bricks/11_megaraid_8_7_15_x_8_8_20_hdd_r1_nolvm_hdd_storage_02/asterisk/records
> Brick5:
> server1:/bricks/12_megaraid_0_7_6_x_0_13_14_hdd_r1_nolvm_hdd_storage_03/asterisk/records
> Brick6:
> server2:/bricks/12_megaraid_8_9_19_x_8_13_24_hdd_r1_nolvm_hdd_storage_03/asterisk/records
> Options Reconfigured:
> cluster.lookup-optimize: on
> cluster.readdir-optimize: on
> client.event-threads: 2
> network.inode-lru-limit: 4096
> server.event-threads: 4
> performance.client-io-threads: on
> storage.linux-aio: on
> performance.write-behind-window-size: 4194304
> performance.stat-prefetch: on
> performance.quick-read: on
> performance.read-ahead: on
> performance.flush-behind: on
> performance.write-behind: on
> performance.io-thread-count: 2
> performance.cache-max-file-size: 1048576
> performance.cache-size: 33554432
> features.cache-invalidation: on
> performance.readdir-ahead: on
> ===
> 
> The issue reproduces each time I rsync such an amount of files.
> 
> How could I debug this issue better?
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