Filed a JIRA here : https://issues.apache.org/jira/browse/ZOOKEEPER-3644
Thanks, Manikumar On Sat, Dec 7, 2019 at 11:46 PM Manikumar <manikumar.re...@gmail.com> wrote: > Hi all, > > I tried to upgrade single node ZK server from 3.4.14 to 3.5.6. There were > no snapshot files, so as suggested in ZOOKEEPER-3056 > <https://issues.apache.org/jira/browse/ZOOKEEPER-3056>, > I have set snapshot.trust.empty to true. After server startup, when I > tried to list the znodes, I found that znodes are missing. > > Looking into the source code, > > https://github.com/apache/zookeeper/blob/release-3.5.6/zookeeper-server/src/main/java/org/apache/zookeeper/server/persistence/FileTxnSnapLog.java#L224 > > looks like we are not reading transaction log if there are no snapshot > files and snapshot.trust.empty is set to true. > > Appreciate any thoughts on this? > > ZK 3.5.6 logs: > [2019-12-07 12:13:35,007] INFO Created server with tickTime 3000 > minSessionTimeout 6000 maxSessionTimeout 60000 datadir > /var/lib/zookeeper/version-2 snapdir /var/lib/zookeeper/version-2 > (org.apache.zookeeper.server.ZooKeeperServer) > [2019-12-07 12:13:35,012] INFO Using > org.apache.zookeeper.server.NIOServerCnxnFactory as server connection > factory (org.apache.zookeeper.server.ServerCnxnFactory) > [2019-12-07 12:13:35,014] INFO Configuring NIO connection handler with 10s > sessionless connection timeout, 1 selector thread(s), 12 worker threads, > and 64 kB direct buffers. (org.apache > .zookeeper.server.NIOServerCnxnFactory) > [2019-12-07 12:13:35,017] INFO binding to port 0.0.0.0/0.0.0.0:2181 > (org.apache.zookeeper.server.NIOServerCnxnFactory) > [2019-12-07 12:13:35,027] INFO zookeeper.snapshotSizeFactor = 0.33 > (org.apache.zookeeper.server.ZKDatabase) > [2019-12-07 12:13:35,029] DEBUG Created new input stream > /var/lib/zookeeper/version-2/log.1 > (org.apache.zookeeper.server.persistence.FileTxnLog) > [2019-12-07 12:13:35,031] DEBUG Created new input archive > /var/lib/zookeeper/version-2/log.1 > (org.apache.zookeeper.server.persistence.FileTxnLog) > [2019-12-07 12:13:35,035] DEBUG EOF exception java.io.EOFException: Failed > to read /var/lib/zookeeper/version-2/log.1 > (org.apache.zookeeper.server.persistence.FileTxnLog) > [2019-12-07 12:13:35,035] WARN No snapshot found, but there are log > entries. This should only be allowed during upgrading. > (org.apache.zookeeper.server.persistence.FileTxnSnapLog) > [2019-12-07 12:13:35,035] INFO Snapshotting: 0x0 to > /var/lib/zookeeper/version-2/snapshot.0 > (org.apache.zookeeper.server.persistence.FileTxnSnapLog) > [2019-12-07 12:13:35,036] INFO Snapshotting: 0x0 to > /var/lib/zookeeper/version-2/snapshot.0 > (org.apache.zookeeper.server.persistence.FileTxnSnapLog) > [2019-12-07 12:13:35,050] INFO Using checkIntervalMs=60000 > maxPerMinute=10000 (org.apache.zookeeper.server.ContainerManager) > [2019-12-07 12:15:07,137] DEBUG Accepted socket connection from / > 127.0.0.1:38888 (org.apache.zookeeper.server.NIOServerCnxnFactory) > [2019-12-07 12:15:07,144] DEBUG Session establishment request from client / > 127.0.0.1:38888 client's lastZxid is 0x0 > (org.apache.zookeeper.server.ZooKeeperServer) > [2019-12-07 12:15:07,145] DEBUG Adding session 0x100006e15fb0000 > (org.apache.zookeeper.server.SessionTrackerImpl) > [2019-12-07 12:15:07,148] TRACE SessionTrackerImpl --- Adding session > 0x100006e15fb0000 30000 (org.apache.zookeeper.server.SessionTrackerImpl) > [2019-12-07 12:15:07,149] DEBUG Client attempting to establish new > session: session = 0x100006e15fb0000, zxid = 0x0, timeout = 30000, address > = /127.0.0.1:38888 (org.apache.zookeeper.server.ZooKeeperServer) > [2019-12-07 12:15:07,155] TRACE :Psessionid:0x100006e15fb0000 > type:createSession cxid:0x0 zxid:0xfffffffffffffffe txntype:unknown > reqpath:n/a (org.apache.zookeeper.server.PrepRequestProcessor) > [2019-12-07 12:15:07,155] TRACE SessionTrackerImpl --- Existing session > 0x100006e15fb0000 30000 (org.apache.zookeeper.server.SessionTrackerImpl) > [2019-12-07 12:15:07,155] INFO Creating new log file: log.1 > (org.apache.zookeeper.server.persistence.FileTxnLog) > [2019-12-07 12:15:07,170] DEBUG Processing request:: > sessionid:0x100006e15fb0000 type:createSession cxid:0x0 zxid:0x1 > txntype:-10 reqpath:n/a (org.apache.zookeeper.server.FinalRequestProcessor) > > > Thanks, > Manikumar >
