huanhuan li created CURATOR-293:
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Summary: Curator can NOT reconnect after connection lost and
session expired when the connection come up while the DNS server is not ready
yet.(zookeeper connection string using domain names)
Key: CURATOR-293
URL: https://issues.apache.org/jira/browse/CURATOR-293
Project: Apache Curator
Issue Type: Bug
Components: Client
Affects Versions: 2.9.1
Reporter: huanhuan li
Priority: Critical
1. Add following lines to the /etc/hosts:
x.x.x.x zk1.test.com
x.x.x.x zk2.test.com
x.x.x.x zk3.test.com
2. RUN the test programme
3. shutdown the network connection to x.x.x.x
4. wait enough for the session expire (for example 10 min)
5. remove the added 3 lines in /etc/hosts
6. open the network connection to x.x.x.x
7. watch that curator cannot reconnect
8. add the 3 lines to /etc/hosts
9. watch that curator cannot reconnect either
The log may look like the following:
[main-SendThread(172.24.2.35:2181)][INFO ]2016-01-26 11:07:45.005
[ClientCnxn.logStartConnect] - Opening socket connection to server
172.24.2.35/172.24.2.35:2181. Will not attempt to authenticate using SASL
(unknown error)
[main-SendThread(172.24.2.35:2181)][INFO ]2016-01-26 11:07:45.050
[ClientCnxn.primeConnection] - Socket connection established to
172.24.2.35/172.24.2.35:2181, initiating session
[main-EventThread][WARN ]2016-01-26 11:07:45.093
[ConnectionState.handleExpiredSession] - Session expired event received
[main-EventThread][DEBUG]2016-01-26 11:07:45.093 [ConnectionState.reset] - reset
[main-SendThread(172.24.2.35:2181)][INFO ]2016-01-26 11:07:45.093
[ClientCnxn.run] - Unable to reconnect to ZooKeeper service, session
0x1525d9593a537af has expired, closing socket connection
[main-EventThread][INFO ]2016-01-26 11:07:45.095 [ZooKeeper.<init>] -
Initiating client connection,
connectString=qazk1.jd.com:2181,qazk1.jd.com:2181,qazk1.jd.com:2181
sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@7e7d611f
[main-EventThread][INFO ]2016-01-26 11:07:45.488 [ClientCnxn.run] - EventThread
shut down
[main-SendThread(111.206.227.147:2181)][INFO ]2016-01-26 11:07:45.615
[ClientCnxn.logStartConnect] - Opening socket connection to server
111.206.227.147/111.206.227.147:2181. Will not attempt to authenticate using
SASL (unknown error)
[Curator-ConnectionStateManager-0][DEBUG]2016-01-26 11:07:58.523
[CuratorZookeeperClient.blockUntilConnectedOrTimedOut] -
blockUntilConnectedOrTimedOut() end. isConnected: false
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