[ZOOKEEPER-2376] Server fails to start if there is a zero-length TxnLog file present in the log directory

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 3.4.6
• Component/s: server

Environment

Windows

• Assignee: Unassigned
• Reporter: Dmitry Ryabkov
• Created: 25/Feb/16 19:45
• Updated: 25/Feb/16 20:39
• Resolved: 25/Feb/16 20:39

Description

If there is an empty TxnLog file in the log file folder, ZooKeeper server fails to start. This is the exception it logs:

2015-11-02 07:41:10.479 -0600 (,,,) main : ERROR org.apache.zookeeper.server.ZooKeeperServerMain - Unexpected exception, exiting abnormally

java.io.EOFException

at java.io.DataInputStream.readInt(DataInputStream.java:392)

at org.apache.jute.BinaryInputArchive.readInt(BinaryInputArchive.java:63)

at org.apache.zookeeper.server.persistence.FileHeader.deserialize(FileHeader.java:64)

at org.apache.zookeeper.server.persistence.FileTxnLog$FileTxnIterator.inStreamCreated(FileTxnLog.java:576)

at org.apache.zookeeper.server.persistence.FileTxnLog$FileTxnIterator.createInputArchive(FileTxnLog.java:595)

at org.apache.zookeeper.server.persistence.FileTxnLog$FileTxnIterator.goToNextLog(FileTxnLog.java:561)

at org.apache.zookeeper.server.persistence.FileTxnLog$FileTxnIterator.next(FileTxnLog.java:643)

at org.apache.zookeeper.server.persistence.FileTxnSnapLog.restore(FileTxnSnapLog.java:158)

at org.apache.zookeeper.server.ZKDatabase.loadDataBase(ZKDatabase.java:223)

at org.apache.zookeeper.server.ZooKeeperServer.loadData(ZooKeeperServer.java:272)

at org.apache.zookeeper.server.ZooKeeperServer.startdata(ZooKeeperServer.java:399)

at org.apache.zookeeper.server.NIOServerCnxnFactory.startup(NIOServerCnxnFactory.java:122)

at org.apache.zookeeper.server.ZooKeeperServerMain.runFromConfig(ZooKeeperServerMain.java:113)

at org.apache.zookeeper.server.ZooKeeperServerMain.initializeAndRun(ZooKeeperServerMain.java:86)

at org.apache.zookeeper.server.ZooKeeperServerMain.main(ZooKeeperServerMain.java:52)

at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:116)

at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:78)

Zero-length log file can be created if FileTxnLog.append() crashes after it creates FileOutputStream but before it serializes and flushes the header.

Issue Links

• duplicates: ZOOKEEPER-2332 Zookeeper failed to start for empty txn log