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https://issues.apache.org/jira/browse/HDFS-7180?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Brandon Li updated HDFS-7180:
-----------------------------
Summary: NFSv3 gateway frequently gets stuck due to GC (was: NFSv3 gateway
frequently gets stuck)
> NFSv3 gateway frequently gets stuck due to GC
> ---------------------------------------------
>
> Key: HDFS-7180
> URL: https://issues.apache.org/jira/browse/HDFS-7180
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: nfs
> Affects Versions: 2.5.0
> Environment: Linux, Fedora 19 x86-64
> Reporter: Eric Zhiqiang Ma
> Assignee: Brandon Li
> Priority: Critical
> Attachments: HDFS-7180.001.patch, HDFS-7180.002.patch,
> HDFS-7180.003.patch
>
>
> We are using Hadoop 2.5.0 (HDFS only) and start and mount the NFSv3 gateway
> on one node in the cluster to let users upload data with rsync.
> However, we find the NFSv3 daemon seems frequently get stuck while the HDFS
> seems working well. (hdfds dfs -ls and etc. works just well). The last stuck
> we found is after around 1 day running and several hundreds GBs of data
> uploaded.
> The NFSv3 daemon is started on one node and on the same node the NFS is
> mounted.
> From the node where the NFS is mounted:
> dmsg shows like this:
> [1859245.368108] nfs: server localhost not responding, still trying
> [1859245.368111] nfs: server localhost not responding, still trying
> [1859245.368115] nfs: server localhost not responding, still trying
> [1859245.368119] nfs: server localhost not responding, still trying
> [1859245.368123] nfs: server localhost not responding, still trying
> [1859245.368127] nfs: server localhost not responding, still trying
> [1859245.368131] nfs: server localhost not responding, still trying
> [1859245.368135] nfs: server localhost not responding, still trying
> [1859245.368138] nfs: server localhost not responding, still trying
> [1859245.368142] nfs: server localhost not responding, still trying
> [1859245.368146] nfs: server localhost not responding, still trying
> [1859245.368150] nfs: server localhost not responding, still trying
> [1859245.368153] nfs: server localhost not responding, still trying
> The mounted directory can not be `ls` and `df -hT` gets stuck too.
> The latest lines from the nfs3 log in the hadoop logs directory:
> 2014-10-02 05:43:20,452 INFO org.apache.hadoop.nfs.nfs3.IdUserGroup: Updated
> user map size: 35
> 2014-10-02 05:43:20,461 INFO org.apache.hadoop.nfs.nfs3.IdUserGroup: Updated
> group map size: 54
> 2014-10-02 05:44:40,374 INFO org.apache.hadoop.hdfs.nfs.nfs3.OpenFileCtx:
> Have to change stable write to unstable write:FILE_SYNC
> 2014-10-02 05:44:40,732 INFO org.apache.hadoop.hdfs.nfs.nfs3.OpenFileCtx:
> Have to change stable write to unstable write:FILE_SYNC
> 2014-10-02 05:46:06,535 INFO org.apache.hadoop.hdfs.nfs.nfs3.OpenFileCtx:
> Have to change stable write to unstable write:FILE_SYNC
> 2014-10-02 05:46:26,075 INFO org.apache.hadoop.hdfs.nfs.nfs3.OpenFileCtx:
> Have to change stable write to unstable write:FILE_SYNC
> 2014-10-02 05:47:56,420 INFO org.apache.hadoop.hdfs.nfs.nfs3.OpenFileCtx:
> Have to change stable write to unstable write:FILE_SYNC
> 2014-10-02 05:48:56,477 INFO org.apache.hadoop.hdfs.nfs.nfs3.OpenFileCtx:
> Have to change stable write to unstable write:FILE_SYNC
> 2014-10-02 05:51:46,750 INFO org.apache.hadoop.hdfs.nfs.nfs3.OpenFileCtx:
> Have to change stable write to unstable write:FILE_SYNC
> 2014-10-02 05:53:23,809 INFO org.apache.hadoop.hdfs.nfs.nfs3.OpenFileCtx:
> Have to change stable write to unstable write:FILE_SYNC
> 2014-10-02 05:53:24,508 INFO org.apache.hadoop.hdfs.nfs.nfs3.OpenFileCtx:
> Have to change stable write to unstable write:FILE_SYNC
> 2014-10-02 05:55:57,334 INFO org.apache.hadoop.hdfs.nfs.nfs3.OpenFileCtx:
> Have to change stable write to unstable write:FILE_SYNC
> 2014-10-02 05:57:07,428 INFO org.apache.hadoop.hdfs.nfs.nfs3.OpenFileCtx:
> Have to change stable write to unstable write:FILE_SYNC
> 2014-10-02 05:58:32,609 INFO org.apache.hadoop.nfs.nfs3.IdUserGroup: Update
> cache now
> 2014-10-02 05:58:32,610 INFO org.apache.hadoop.nfs.nfs3.IdUserGroup: Not
> doing static UID/GID mapping because '/etc/nfs.map' does not exist.
> 2014-10-02 05:58:32,620 INFO org.apache.hadoop.nfs.nfs3.IdUserGroup: Updated
> user map size: 35
> 2014-10-02 05:58:32,628 INFO org.apache.hadoop.nfs.nfs3.IdUserGroup: Updated
> group map size: 54
> 2014-10-02 06:01:32,098 WARN org.apache.hadoop.hdfs.DFSClient: Slow
> ReadProcessor read fields took 60062ms (threshold=30000ms); ack: seqno: -2
> status: SUCCESS status: ERROR downstreamAckTimeNanos: 0, targets:
> [10.0.3.172:50010, 10.0.3.176:50010]
> 2014-10-02 06:01:32,099 WARN org.apache.hadoop.hdfs.DFSClient:
> DFSOutputStream ResponseProcessor exception for block
> BP-1960069741-10.0.3.170-1410430543652:blk_1074363564_623643
> java.io.IOException: Bad response ERROR for block
> BP-1960069741-10.0.3.170-1410430543652:blk_1074363564_623643 from datanode
> 10.0.3.176:50010
> at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer$ResponseProcessor.run(DFSOutputStream.java:828)
> 2014-10-02 06:07:00,368 WARN org.apache.hadoop.hdfs.DFSClient: Error Recovery
> for block BP-1960069741-10.0.3.170-1410430543652:blk_1074363564_623643 in
> pipeline 10.0.3.172:50010, 10.0.3.176:50010: bad datanode 10.0.3.176:50010
> The logs seems suggest 10.0.3.176 is bad. However, from the `hdfs dfsadmin
> -report`, all nodes in the cluster seems working.
> Any help will be appreciated. Thanks in advance.
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