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yanghuafeng commented on HDFS-13836: ------------------------------------ Add a unit test case, please review the code. [~elgoiri] > RBF: To handle the exception when the mounttable znode have null value. > ----------------------------------------------------------------------- > > Key: HDFS-13836 > URL: https://issues.apache.org/jira/browse/HDFS-13836 > Project: Hadoop HDFS > Issue Type: Bug > Components: federation, hdfs > Affects Versions: 3.1.0 > Reporter: yanghuafeng > Assignee: yanghuafeng > Priority: Major > Fix For: 2.9.0, 3.0.0, 3.1.0, 3.2.0 > > Attachments: HDFS-13836.001.patch, HDFS-13836.002.patch > > > When we are adding the mounttable entry, the router sever is terminated. > Some error messages show in log, as follow: > 2018-08-20 14:18:32,404 ERROR > org.apache.hadoop.hdfs.server.federation.store.driver.impl.StateStoreZooKeeperImpl: > Cannot get data for 0SLASH0testzk: null. > The reason is that router server have created the znode but not to set data > before being terminated. But the method zkManager.getStringData(path, stat) > will throw NPE if the path has null value in the StateStoreZooKeeperImpl, > leading to fail in adding the same mounttable entry and deleting the existing > znode. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org