Adam Phelps
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to Aurelius
We're using Titan 0.5.4 on top of HBase (CDH 5.1) and connect to the
graph via Java. We've noticed that even when our application is idle it
appears to be frequently (roughly every 5 seconds) disconnecting and
reconnecting to Zookeeper. We haven't seen this sort of behavior in our
other Java applications which access non-Titan HBase tables.
Is this connection cycling normal for Titan, or is there some
configuration setting that will allow it to maintain a longer connection?
- Adam
2016-01-04 22:33:23.027258500 [pool-4-thread-1] INFO
org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper - Process
identifier=catalogtracker-on-hconnection-0xe4d2696 connecting to
ZooKeeper ensemble=AA.BB.CC.DD:2181
2016-01-04 22:33:23.027262500 [pool-4-thread-1] INFO
org.apache.zookeeper.ZooKeeper - Initiating client connection,
connectString=AA.BB.CC.DD:2181 sessionTimeout=90000
watcher=catalogtracker-on-hconnection-0xe4d2696,
quorum=AA.BB.CC.DD:2181, baseZNode=/hbase
2016-01-04 22:33:23.031587500
[pool-4-thread-1-SendThread(AA.BB.CC.DD:2181)] INFO
org.apache.zookeeper.ClientCnxn - Opening socket connection to server
AA.BB.CC.DD/AA.BB.CC.DD:2181. Will not attempt to authenticate using
SASL (unknown error)
2016-01-04 22:33:23.032295500
[pool-4-thread-1-SendThread(AA.BB.CC.DD:2181)] INFO
org.apache.zookeeper.ClientCnxn - Socket connection established to
AA.BB.CC.DD/AA.BB.CC.DD:2181, initiating session
2016-01-04 22:33:23.035536500
[pool-4-thread-1-SendThread(AA.BB.CC.DD:2181)] INFO
org.apache.zookeeper.ClientCnxn - Session establishment complete on
server AA.BB.CC.DD/AA.BB.CC.DD:2181, sessionid = 0x14f4788b0142ab3,
negotiated timeout = 60000
2016-01-04 22:33:23.043678500 [pool-4-thread-1] INFO
org.apache.zookeeper.ZooKeeper - Session: 0x14f4788b0142ab3 closed
2016-01-04 22:33:23.043742500 [pool-4-thread-1-EventThread] INFO
org.apache.zookeeper.ClientCnxn - EventThread shut down
2016-01-04 22:33:28.064266500 [pool-4-thread-1] INFO
org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper - Process
identifier=catalogtracker-on-hconnection-0xe4d2696 connecting to
ZooKeeper ensemble=AA.BB.CC.DD:2181
2016-01-04 22:33:28.064269500 [pool-4-thread-1] INFO
org.apache.zookeeper.ZooKeeper - Initiating client connection,
connectString=AA.BB.CC.DD:2181 sessionTimeout=90000
watcher=catalogtracker-on-hconnection-0xe4d2696,
quorum=AA.BB.CC.DD:2181, baseZNode=/hbase
2016-01-04 22:33:28.064971500
[pool-4-thread-1-SendThread(AA.BB.CC.DD:2181)] INFO
org.apache.zookeeper.ClientCnxn - Opening socket connection to server
AA.BB.CC.DD/AA.BB.CC.DD:2181. Will not attempt to authenticate using
SASL (unknown error)
2016-01-04 22:33:28.065737500
[pool-4-thread-1-SendThread(AA.BB.CC.DD:2181)] INFO
org.apache.zookeeper.ClientCnxn - Socket connection established to
AA.BB.CC.DD/AA.BB.CC.DD:2181, initiating session
2016-01-04 22:33:28.067627500
[pool-4-thread-1-SendThread(AA.BB.CC.DD:2181)] INFO
org.apache.zookeeper.ClientCnxn - Session establishment complete on
server AA.BB.CC.DD/AA.BB.CC.DD:2181, sessionid = 0x14f4788b0142ae5,
negotiated timeout = 60000
2016-01-04 22:33:28.074976500 [pool-4-thread-1] INFO
org.apache.zookeeper.ZooKeeper - Session: 0x14f4788b0142ae5 closed
2016-01-04 22:33:28.075288500 [pool-4-thread-1-EventThread] INFO
org.apache.zookeeper.ClientCnxn - EventThread shut down
^X2016-01-04 22:33:33.090543500 [pool-4-thread-1] INFO
org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper - Process
identifier=catalogtracker-on-hconnection-0xe4d2696 connecting to
ZooKeeper ensemble=AA.BB.CC.DD:2181
2016-01-04 22:33:33.090546500 [pool-4-thread-1] INFO
org.apache.zookeeper.ZooKeeper - Initiating client connection,
connectString=AA.BB.CC.DD:2181 sessionTimeout=90000
watcher=catalogtracker-on-hconnection-0xe4d2696,
quorum=AA.BB.CC.DD:2181, baseZNode=/hbase
2016-01-04 22:33:33.095093500
[pool-4-thread-1-SendThread(AA.BB.CC.DD:2181)] INFO
org.apache.zookeeper.ClientCnxn - Opening socket connection to server
AA.BB.CC.DD/AA.BB.CC.DD:2181. Will not attempt to authenticate using
SASL (unknown error)
2016-01-04 22:33:33.098406500
[pool-4-thread-1-SendThread(AA.BB.CC.DD:2181)] INFO
org.apache.zookeeper.ClientCnxn - Socket connection established to
AA.BB.CC.DD/AA.BB.CC.DD:2181, initiating session
2016-01-04 22:33:33.100650500
[pool-4-thread-1-SendThread(AA.BB.CC.DD:2181)] INFO
org.apache.zookeeper.ClientCnxn - Session establishment complete on
server AA.BB.CC.DD/AA.BB.CC.DD:2181, sessionid = 0x14f4788b0142b16,
negotiated timeout = 60000
2016-01-04 22:33:33.110387500 [pool-4-thread-1] INFO
org.apache.zookeeper.ZooKeeper - Session: 0x14f4788b0142b16 closed
2016-01-04 22:33:33.110572500 [pool-4-thread-1-EventThread] INFO
org.apache.zookeeper.ClientCnxn - EventThread shut down