Sergey Shelukhin created HDFS-14498: ---------------------------------------
Summary: LeaseManager can loop forever on the file for which create has failed Key: HDFS-14498 URL: https://issues.apache.org/jira/browse/HDFS-14498 Project: Hadoop HDFS Issue Type: Bug Affects Versions: 2.9.0 Reporter: Sergey Shelukhin The logs from file creation are long gone due to infinite lease logging, however it presumably failed... the client who was trying to write this file is definitely long dead. The version includes HDFS-4882. We get this log pattern repeating infinitely: {noformat} 2019-05-16 14:00:16,893 INFO [org.apache.hadoop.hdfs.server.namenode.LeaseManager$Monitor@b27557f] org.apache.hadoop.hdfs.server.namenode.LeaseManager: [Lease. Holder: DFSClient_NONMAPREDUCE_-20898906_61, pending creates: 1] has expired hard limit 2019-05-16 14:00:16,893 INFO [org.apache.hadoop.hdfs.server.namenode.LeaseManager$Monitor@b27557f] org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Recovering [Lease. Holder: DFSClient_NONMAPREDUCE_-20898906_61, pending creates: 1], src=<snip> 2019-05-16 14:00:16,893 WARN [org.apache.hadoop.hdfs.server.namenode.LeaseManager$Monitor@b27557f] org.apache.hadoop.hdfs.StateChange: DIR* NameSystem.internalReleaseLease: Failed to release lease for file <snip>. Committed blocks are waiting to be minimally replicated. Try again later. 2019-05-16 14:00:16,893 WARN [org.apache.hadoop.hdfs.server.namenode.LeaseManager$Monitor@b27557f] org.apache.hadoop.hdfs.server.namenode.LeaseManager: Cannot release the path <snip> in the lease [Lease. Holder: DFSClient_NONMAPREDUCE_-20898906_61, pending creates: 1]. It will be retried. org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException: DIR* NameSystem.internalReleaseLease: Failed to release lease for file <snip>. Committed blocks are waiting to be minimally replicated. Try again later. at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.internalReleaseLease(FSNamesystem.java:3357) at org.apache.hadoop.hdfs.server.namenode.LeaseManager.checkLeases(LeaseManager.java:573) at org.apache.hadoop.hdfs.server.namenode.LeaseManager$Monitor.run(LeaseManager.java:509) at java.lang.Thread.run(Thread.java:745) $ grep -c "Recovering.*DFSClient_NONMAPREDUCE_-20898906_61, pending creates: 1" hdfs_nn* hdfs_nn.log:1068035 hdfs_nn.log.2019-05-16-14:1516179 hdfs_nn.log.2019-05-16-15:1538350 {noformat} Aside from an actual bug fix, it might make sense to make LeaseManager not log so much, in case if there are more bugs like this... -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-dev-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-dev-h...@hadoop.apache.org