[ https://issues.apache.org/jira/browse/HDFS-15915?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Konstantin Shvachko updated HDFS-15915: --------------------------------------- Attachment: HDFS-15915-02.patch > Race condition with async edits logging due to updating txId outside of the > namesystem log > ------------------------------------------------------------------------------------------ > > Key: HDFS-15915 > URL: https://issues.apache.org/jira/browse/HDFS-15915 > Project: Hadoop HDFS > Issue Type: Bug > Components: hdfs, namenode > Reporter: Konstantin Shvachko > Assignee: Konstantin Shvachko > Priority: Major > Attachments: HDFS-15915-01.patch, HDFS-15915-02.patch, > testMkdirsRace.patch > > > {{FSEditLogAsync}} creates an {{FSEditLogOp}} and populates its fields inside > {{FSNamesystem.writeLock}}. But one essential field the transaction id of the > edits op remains unset until the time when the operation is scheduled for > synching. At that time {{beginTransaction()}} will set the the > {{FSEditLogOp.txid}} and increment the global transaction count. On busy > NameNode this event can fall outside the write lock. > This causes problems for Observer reads. It also can potentially reshuffle > transactions and Standby will apply them in a wrong order. -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org