[HBASE-21453] Convert ReadOnlyZKClient to DEBUG instead of INFO

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0-alpha-1, 2.2.0, 2.1.2
• Component/s: logging, Zookeeper
• Release Note: Log level of ReadOnlyZKClient moved to debug.
• Assignee: Sakthi
• Reporter: Michael Stack
• Created: 08/Nov/18 05:10
• Updated: 04/Feb/19 00:56
• Resolved: 11/Dec/18 07:20

Description

Running commands in spark-shell, this is what it looks like on each invocation:

scala> val count = rdd.count()
2018-11-07 21:01:46,026 INFO  [Executor task launch worker for task 1] zookeeper.ReadOnlyZKClient: Connect 0x18f3d868 to localhost:2181 with session timeout=90000ms, retries 30, retry interval 1000ms, keepAlive=60000ms
2018-11-07 21:01:46,027 INFO  [ReadOnlyZKClient-localhost:2181@0x18f3d868] zookeeper.ZooKeeper: Initiating client connection, connectString=localhost:2181 sessionTimeout=90000 watcher=org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient$$Lambda$20/1362339879@743dab9f
2018-11-07 21:01:46,030 INFO  [ReadOnlyZKClient-localhost:2181@0x18f3d868-SendThread(localhost:2181)] zookeeper.ClientCnxn: Opening socket connection to server localhost/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
2018-11-07 21:01:46,031 INFO  [ReadOnlyZKClient-localhost:2181@0x18f3d868-SendThread(localhost:2181)] zookeeper.ClientCnxn: Socket connection established to localhost/127.0.0.1:2181, initiating session
2018-11-07 21:01:46,033 INFO  [ReadOnlyZKClient-localhost:2181@0x18f3d868-SendThread(localhost:2181)] zookeeper.ClientCnxn: Session establishment complete on server localhost/127.0.0.1:2181, sessionid = 0x166f1b283080005, negotiated timeout = 40000
2018-11-07 21:01:46,035 INFO  [Executor task launch worker for task 1] mapreduce.TableInputFormatBase: Input split length: 0 bytes.
[Stage 1:>                                                          (0 + 1) / 1]2018-11-07 21:01:48,074 INFO  [Executor task launch worker for task 1] zookeeper.ReadOnlyZKClient: Close zookeeper connection 0x18f3d868 to localhost:2181
2018-11-07 21:01:48,075 INFO  [ReadOnlyZKClient-localhost:2181@0x18f3d868] zookeeper.ZooKeeper: Session: 0x166f1b283080005 closed
2018-11-07 21:01:48,076 INFO  [ReadOnlyZKClient -localhost:2181@0x18f3d868-EventThread] zookeeper.ClientCnxn: EventThread shut down for session: 0x166f1b283080005
count: Long = 10

Let me shut down the ReadOnlyZKClient log level.