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Posted to hdfs-issues@hadoop.apache.org by "Colin Patrick McCabe (JIRA)" <ji...@apache.org> on 2014/05/28 19:45:03 UTC
[jira] [Updated] (HDFS-6448) BlockReaderLocalLegacy should set
socket timeout via conf.socketTimeout
[ https://issues.apache.org/jira/browse/HDFS-6448?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Colin Patrick McCabe updated HDFS-6448:
---------------------------------------
Summary: BlockReaderLocalLegacy should set socket timeout via conf.socketTimeout (was: change BlockReaderLocalLegacy timeout detail)
> BlockReaderLocalLegacy should set socket timeout via conf.socketTimeout
> -----------------------------------------------------------------------
>
> Key: HDFS-6448
> URL: https://issues.apache.org/jira/browse/HDFS-6448
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs-client
> Affects Versions: 3.0.0, 2.4.0
> Reporter: Liang Xie
> Assignee: Liang Xie
> Fix For: 2.5.0
>
> Attachments: HDFS-6448.txt
>
>
> Our hbase deployed upon hadoop2.0, in one accident, we hit HDFS-5016 in HDFS side, but we also found from HBase side, the dfs client was hung at getBlockReader, after reading code, we found there is a timeout setting in current codebase though, but the default hdfsTimeout value is "-1" ( from Client.java:getTimeout(conf) )which means no timeout...
> The hung stack trace like following:
> at $Proxy21.getBlockLocalPathInfo(Unknown Source)
> at org.apache.hadoop.hdfs.protocolPB.ClientDatanodeProtocolTranslatorPB.getBlockLocalPathInfo(ClientDatanodeProtocolTranslatorPB.java:215)
> at org.apache.hadoop.hdfs.BlockReaderLocal.getBlockPathInfo(BlockReaderLocal.java:267)
> at org.apache.hadoop.hdfs.BlockReaderLocal.newBlockReader(BlockReaderLocal.java:180)
> at org.apache.hadoop.hdfs.DFSClient.getLocalBlockReader(DFSClient.java:812)
> One feasible fix is replacing the hdfsTimeout with socketTimeout. see attached patch. Most of credit should give [~liushaohui]
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