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

[Dmitry Ryabkov (JIRA)]

Dmitry Ryabkov created ZOOKEEPER-2376:
-----------------------------------------

             Summary: Server fails to start if there is a zero-length TxnLog 
file present in the log directory
                 Key: ZOOKEEPER-2376
                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2376
             Project: ZooKeeper
          Issue Type: Bug
          Components: server
    Affects Versions: 3.4.6
         Environment: Windows
            Reporter: Dmitry Ryabkov


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.



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