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https://issues.apache.org/jira/browse/HDFS-3423?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13286446#comment-13286446
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Uma Maheswara Rao G commented on HDFS-3423:
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oh, I have refactored the reset method using eclipse. It is automatically
adding that :-). Infact that is alrady an IOE, and method also throws IOE. I
think, I can remove that, I will upload it again. Thanks Ivan.
> BKJM: NN startup is failing, when tries to recoverUnfinalizedSegments() a bad
> inProgress_ ZNodes
> ------------------------------------------------------------------------------------------------
>
> Key: HDFS-3423
> URL: https://issues.apache.org/jira/browse/HDFS-3423
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Affects Versions: 3.0.0
> Reporter: Rakesh R
> Assignee: Ivan Kelly
> Attachments: HDFS-3423.diff, HDFS-3423.diff, HDFS-3423.diff,
> HDFS-3423.patch
>
>
> Say, the InProgress_000X node is corrupted due to not writing the
> data(version, ledgerId, firstTxId) to this inProgress_000X znode. Namenode
> startup has the logic to recover all the unfinalized segments, here will try
> to read the segment and getting shutdown.
> {noformat}
> EditLogLedgerMetadata.java:
> static EditLogLedgerMetadata read(ZooKeeper zkc, String path)
> throws IOException, KeeperException.NoNodeException {
> byte[] data = zkc.getData(path, false, null);
> String[] parts = new String(data).split(";");
> if (parts.length == 3)
> ....reading inprogress metadata
> else if (parts.length == 4)
> ....reading inprogress metadata
> else
> throw new IOException("Invalid ledger entry, "
> + new String(data));
> }
> {noformat}
> Scenario:- Leaving bad inProgress_000X node ?
> Assume BKJM has created the inProgress_000X zNode and ZK is not available
> when trying to add the metadata. Now, inProgress_000X ends up with partial
> information.
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