Todd Lipcon created HDFS-3725: --------------------------------- Summary: Fix QJM startup when individual JNs have gaps Key: HDFS-3725 URL: https://issues.apache.org/jira/browse/HDFS-3725 Project: Hadoop HDFS Issue Type: Sub-task Components: ha Affects Versions: QuorumJournalManager (HDFS-3077) Reporter: Todd Lipcon Assignee: Todd Lipcon Priority: Minor
This fixes a bug in the HDFS-3077 branch: If one of the JNs goes down and comes back up, it may have a discontiguous set of logs in its storage directories. This means that a future {{getEditLogManifest}} call will return a manifest that has gaps - eg it may have txn 1-3 and 7-9 but be missing 4-6. This is OK because it's guaranteed that a quorum of JNs do have those edits elsewhere. This situation currently causes an exception since the RemoteEditLogManifest constructor verifies that the returned log files form a contiguous set of edits. That was true for the NameNode but no longer true for this new usage. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira