[BOOKKEEPER-39] Bookie server failed to restart because of too many ledgers (more than ~50,000 ledgers)

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.0.0
• Fix Version/s: 4.0.0
• Component/s: bookkeeper-server
• Assignee: Ivan Kelly
• Reporter: Sijie Guo
• Created: 08/Aug/11 09:15
• Updated: 08/Jun/16 08:15
• Resolved: 28/Nov/11 18:29

Description

If we have ~500,000 topics in hedwig, we might have more than ~500,000 ledgers in bookkeeper (a topic has more than 1 ledger). So when the bookie server restarted, a logfile GC thread is started, which will call zk.getChildren to fetch all ledgers, and it failed because of package length limitation.

2011-08-01 01:18:46,373 - ERROR [main-EventThread:EntryLogger$GarbageCollectorThread$1@164] - Error polling ZK for the available ledger nodes:
org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /ledgers
at org.apache.zookeeper.KeeperException.create(KeeperException.java:99)
at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
at org.apache.zookeeper.ZooKeeper.getChildren(ZooKeeper.java:1519)
at org.apache.bookkeeper.bookie.EntryLogger$GarbageCollectorThread$1.processResult(EntryLogger.java:162)
at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:592)
at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:481)
2011-08-01 01:18:46,373 - WARN [main-EventThread:Bookie$1@242] - ZK client has been disconnected to the ZK server!
2011-08-01 01:18:47,278 - WARN [main-SendThread(perf13.platform.mobile.sp2.yahoo.com:2181):ClientCnxn$SendThread@980] - Session 0x131833dec850034 for server perf13.platform.mobile.sp2.yahoo.com/98.139.43.86:2181, unexpected error, closing socket connection and attempting reconnect
java.io.IOException: Packet len9976413 is out of range!
at org.apache.zookeeper.ClientCnxnSocket.readLength(ClientCnxnSocket.java:112)
at org.apache.zookeeper.ClientCnxnSocketNIO.doIO(ClientCnxnSocketNIO.java:78)
at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:264)
at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:958)

Issue Links

• depends upon: BOOKKEEPER-108 add configuration support for BK
• is related to: BOOKKEEPER-878 verify switching FlatLedgerManager to HierarchicalLedgerManager