Wei-Chiu Chuang created HDFS-11741:
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Summary: 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
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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