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From "Wei-Chiu Chuang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-11741) Long running balancer may fail due to expired DataEncryptionKey
Date Tue, 11 Jul 2017 23:57:00 GMT

     [ https://issues.apache.org/jira/browse/HDFS-11741?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Wei-Chiu Chuang updated HDFS-11741:
-----------------------------------
    Fix Version/s: 2.7.4

> Long running balancer may fail due to expired DataEncryptionKey
> ---------------------------------------------------------------
>
>                 Key: HDFS-11741
>                 URL: https://issues.apache.org/jira/browse/HDFS-11741
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: balancer & mover
>         Environment: CDH5.8.2, Kerberos, Data transfer encryption enabled. Balancer login
using keytab
>            Reporter: Wei-Chiu Chuang
>            Assignee: Wei-Chiu Chuang
>             Fix For: 2.9.0, 2.7.4, 3.0.0-alpha4, 2.8.2
>
>         Attachments: block keys.png, HDFS-11741.001.patch, HDFS-11741.002.patch, HDFS-11741.003.patch,
HDFS-11741.004.patch, HDFS-11741.005.patch, HDFS-11741.06.patch, HDFS-11741.07.patch, HDFS-11741.08.patch,
HDFS-11741.branch-2.01.patch
>
>
> We found a long running balancer may fail despite using keytab, because KeyManager returns
expired DataEncryptionKey, and it throws the following exception:
> {noformat}
> 2017-04-30 05:03:58,661 WARN  [pool-1464-thread-10] balancer.Dispatcher (Dispatcher.java:dispatch(325))
- Failed to move blk_1067352712_3913241 with size=546650 from 10.0.0.134:50010:DISK to 10.0.0.98:50010:DISK
through 10.0.0.134:50010
> org.apache.hadoop.hdfs.protocol.datatransfer.InvalidEncryptionKeyException: Can't re-compute
encryption key for nonce, since the required block key (keyID=1005215027) doesn't exist. Current
key: 1005215030
>         at org.apache.hadoop.hdfs.protocol.datatransfer.sasl.DataTransferSaslUtil.readSaslMessageAndNegotiatedCipherOption(DataTransferSaslUtil.java:417)
>         at org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferClient.doSaslHandshake(SaslDataTransferClient.java:474)
>         at org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferClient.getEncryptedStreams(SaslDataTransferClient.java:299)
>         at org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferClient.send(SaslDataTransferClient.java:242)
>         at org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferClient.checkTrustAndSend(SaslDataTransferClient.java:211)
>         at org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferClient.socketSend(SaslDataTransferClient.java:183)
>         at org.apache.hadoop.hdfs.server.balancer.Dispatcher$PendingMove.dispatch(Dispatcher.java:311)
>         at org.apache.hadoop.hdfs.server.balancer.Dispatcher$PendingMove.access$2300(Dispatcher.java:182)
>         at org.apache.hadoop.hdfs.server.balancer.Dispatcher$1.run(Dispatcher.java:899)
>         at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
>         at java.lang.Thread.run(Thread.java:745)
> {noformat}
> This bug is similar in nature to HDFS-10609. While balancer KeyManager actively synchronizes
itself with NameNode w.r.t block keys, it does not update DataEncryptionKey accordingly.
> In a specific cluster, with Kerberos ticket life time 10 hours, and default block token
expiration/life time 10 hours, a long running balancer failed after 20~30 hours.



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