[ZOOKEEPER-1213] ZooKeeper server startup fails if configured only with the 'minSessionTimeout' and not 'maxSessionTimeout'

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.3.3
• Fix Version/s: 3.5.0
• Component/s: server
• Assignee: Rakesh Radhakrishnan
• Reporter: Rakesh Radhakrishnan
• Created: 04/Oct/11 14:02
• Updated: 25/Mar/14 21:15
• Resolved: 25/Mar/14 21:15

Description

I have configured only the 'minSessionTimeout' and not configured 'maxSessionTimeout' in the zoo.cfg file as follows

zoo.cfg

tickTime=2000
minSessionTimeout=10000

I'm seeing the following exception and not starting the ZooKeeper server

2011-10-07 23:39:10,546 - INFO  [main:QuorumPeerConfig@100] - Reading configuration from: /home/rakeshr/zookeeper/bin/../conf/zoo.cfg
2011-10-07 23:39:12,334 - ERROR [main:QuorumPeerMain@85] - Invalid config, exiting abnormally
org.apache.zookeeper.server.quorum.QuorumPeerConfig$ConfigException: Error processing /home/rakeshr/zookeeper/bin/../conf/zoo.cfg
	at org.apache.zookeeper.server.quorum.QuorumPeerConfig.parse(QuorumPeerConfig.java:120)
	at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:101)
	at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:78)
Caused by: java.lang.IllegalArgumentException: minSessionTimeout must not be larger than maxSessionTimeout
	at org.apache.zookeeper.server.quorum.QuorumPeerConfig.parseProperties(QuorumPeerConfig.java:265)
	at org.apache.zookeeper.server.quorum.QuorumPeerConfig.parse(QuorumPeerConfig.java:116)
	... 2 more

Startup fails due to the following validation. Here maxSessionTimeout value is -1 rather than the upper limit (tickTime * 2)

         /** defaults to -1 if not set explicitly */
         protected int maxSessionTimeout = -1;

        if (minSessionTimeout > maxSessionTimeout) {
            throw new IllegalArgumentException(
                    "minSessionTimeout must not be larger than maxSessionTimeout");
        }

Issue Links

• is part of: ZOOKEEPER-1227 Zookeeper logs is showing -1 as min/max session timeout if there is no sessiontimeout value configured