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Aaron T. Myers updated HDFS-5074: --------------------------------- Resolution: Fixed Fix Version/s: 2.3.0 Hadoop Flags: Reviewed Status: Resolved (was: Patch Available) I've just committed this to trunk, branch-2, and branch-2.3. Thanks a lot for the contribution, Todd. > Allow starting up from an fsimage checkpoint in the middle of a segment > ----------------------------------------------------------------------- > > Key: HDFS-5074 > URL: https://issues.apache.org/jira/browse/HDFS-5074 > Project: Hadoop HDFS > Issue Type: Bug > Components: ha, namenode > Affects Versions: 3.0.0, 2.1.0-beta > Reporter: Todd Lipcon > Assignee: Todd Lipcon > Fix For: 2.3.0 > > Attachments: hdfs-5074.txt, hdfs-5074.txt > > > We've seen the following behavior a couple times: > - SBN is running and somehow encounters an error in the middle of replaying > an edit log in the tailer (eg the JN it's reading from crashes) > - SBN successfully has processed half of the edits in the segment it was > reading. > - SBN saves a checkpoint, which now falls in the middle of a segment, and > then restarts > Upon restart, the SBN will load this checkpoint which falls in the middle of > a segment. {{selectInputStreams}} then fails when the SBN requests a > mid-segment txid. > We should handle this case by downloading the right segment and > fast-forwarding to the correct txid. -- This message was sent by Atlassian JIRA (v6.1.4#6159)