HanRyong,Jung created HDFS-12204:
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Summary: Dfsclient Do not close file descriptor when using
shortcircuit
Key: HDFS-12204
URL: https://issues.apache.org/jira/browse/HDFS-12204
Project: Hadoop HDFS
Issue Type: Bug
Components: hdfs-client
Affects Versions: 2.7.3
Environment:
HDFS 2.7.3, HBASE 1.2.6, centOS 6.8
Reporter: HanRyong,Jung
I am a user using HDFS 2.7.3, HBASE 1.2.6, centOS 6.8.
The regionserver uses 11 hard disks(jbod) and uses the hbase short circuit.
At this time, when one disk fails in HDFS, I found a phenomenon that I did a
hotswap but did not close file descriptor in hbase.
And the fd path on the umount disk is changed to an incorrect path.
If I check /proc/regionserver_pid/fd, if I used /data1/volumn and umounted
data1, the path changed to /volumn.
And many file descriptors used in shortcircuit are in the delete state.
example )
ls -al /proc/regionserver_pid/fd
lr-x------ 1 dragonboy dragonboy 64 2017-07-26 20:54 946 ->
/data8/volumn/hdfs/datanode/current/BP-199986352-10.114.243.73-1490077615453/current/finalized/subdir111/subdir21/blk_1215239490
(deleted)
lr-x------ 1 dragonboy dragonboy 64 2017-07-26 20:54 947 ->
/data8/volumn/hdfs/datanode/current/BP-199986352-10.114.243.73-1490077615453/current/finalized/subdir111/subdir21/blk_1215239490_141511919.meta
(deleted)
lr-x------ 1 dragonboy dragonboy 64 2017-07-26 20:54 948 ->
/data7/volumn/hdfs/datanode/current/BP-199986352-10.114.243.73-1490077615453/current/finalized/subdir111/subdir27/blk_1215241080
(deleted)
lr-x------ 1 dragonboy dragonboy 64 2017-07-26 20:54 949 ->
/data7/volumn/hdfs/datanode/current/BP-199986352-10.114.243.73-1490077615453/current/finalized/subdir111/subdir27/blk_1215241080_141513509.meta
(deleted)
lr-x------ 1 dragonboy dragonboy 64 2017-07-26 20:54 *192 ->
/volumn/hdfs/datanode/current/BP-199986352-10.114.243.73-1490077615453/current/finalized/subdir244/subdir160/blk_1257545757
(deleted)*
.
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.
.
when data4 fails, execute fuser)
/sbin/fuser -cu /data4
Cannot stat file /proc/regionserver_pid/fd/*192*: input/output error
Cannot stat file /proc/regionserver_pid/fd/1282: input/output error
Cannot stat file /proc/regionserver_pid/fd/1283: input/output error
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