Rakesh R created HDFS-3382:
------------------------------
Summary: BookKeeperJournalManager: NN startup is failing, when
tries to recoverUnfinalizedSegments() a bad inProgress_ ZNodes
Key: HDFS-3382
URL: https://issues.apache.org/jira/browse/HDFS-3382
Project: Hadoop HDFS
Issue Type: Bug
Reporter: Rakesh R
Fix For: 0.24.0
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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