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From "James Taylor (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (PHOENIX-4502) Phoenix-Spark plugin doesn't release zookeeper connections
Date Tue, 23 Jan 2018 17:31:00 GMT

    [ https://issues.apache.org/jira/browse/PHOENIX-4502?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16335571#comment-16335571
] 

James Taylor edited comment on PHOENIX-4502 at 1/23/18 5:30 PM:
----------------------------------------------------------------

Duplicate of PHOENIX-4503.


was (Author: snalapure@dataken.net):
Duplicate of 4503.

> Phoenix-Spark plugin doesn't release zookeeper connections
> ----------------------------------------------------------
>
>                 Key: PHOENIX-4502
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-4502
>             Project: Phoenix
>          Issue Type: Bug
>    Affects Versions: 4.11.0
>         Environment: HBase 1.2 on Linux (Ubuntu, CentOS)
>            Reporter: Suhas Nalapure
>            Priority: Major
>
> *1. Phoenix-Spark plugin doesn't release zookeeper connections*
> Example: 
> 		_for(int i=0; i < 50; i++){
> 			Dataset<Row> df = sqlContext.read().format("org.apache.phoenix.spark")
> 					.option("table", "\"Sales\"").option("zkUrl", "localhost:2181")
> 					.load();
> 			df.show(2);
> 		}
> 		Thread.sleep(1000*60); _    
>  When the above snippet is executed, we can see number of connections to 2181 increasing
and not getting released until after the main thread wakes up from sleep and program ends
as can be seen below (14 is the number of connections even before the program starts to run)
:
> netstat -anp | grep 2181|grep EST| wc -l; date +"%H:%M:%S"
> 14
> 16:52:05
> root@user1 ~ $ netstat -anp | grep 2181|grep EST| wc -l; date +"%H:%M:%S"
> 22
> 16:52:15
> root@user1 ~ $ netstat -anp | grep 2181|grep EST| wc -l; date +"%H:%M:%S"
> 38
> 16:52:18
> root@user1 ~ $ netstat -anp | grep 2181|grep EST| wc -l; date +"%H:%M:%S"
> 68
> 16:52:23
> root@user1 ~ $ netstat -anp | grep 2181|grep EST| wc -l; date +"%H:%M:%S"
> 100
> 16:52:27
> root@user1 ~ $ netstat -anp | grep 2181|grep EST| wc -l; date +"%H:%M:%S"
> 116
> 16:52:32
> root@user1 ~ $ netstat -anp | grep 2181|grep EST| wc -l; date +"%H:%M:%S"
> 116
> 16:52:38
> root@user1 ~ $ netstat -anp | grep 2181|grep EST| wc -l; date +"%H:%M:%S"
> 116
> 16:52:52
> root@user1 ~ $ netstat -anp | grep 2181|grep EST| wc -l; date +"%H:%M:%S"
> 116
> 16:53:00
> root@user1 ~ $ netstat -anp | grep 2181|grep EST| wc -l; date +"%H:%M:%S"
> 116
> 16:53:24
> root@user1 ~ $ netstat -anp | grep 2181|grep EST| wc -l; date +"%H:%M:%S"
> 14
> 16:53:32
> root@user1 ~ $ netstat -anp | grep 2181|grep EST| wc -l; date +"%H:%M:%S"
> 14
> 16:53:34
> root@user1 ~ $
> *2. Instead if "jdbc" format is used to create Spark Dataframe, the connection count
doesn't shoot up *
> Example:
> 		_for(int i=0; i < 50; i++){			
> 			Dataset<Row> df = sqlContext.read().format("jdbc")
> 					.option("url", "jdbc:phoenix:localhost:2181")
> 					.option("dbtable", "\"Sales\"")
> 					.option("driver", "org.apache.phoenix.jdbc.PhoenixDriver")
> 					.load();
> 			df.show(2);
> 		}
> 		Thread.sleep(1000*60);_			
> Connection counts during program execution(14 being the count before execution starts):
> root@user1 ~ $ netstat -anp | grep 2181|grep EST| wc -l; date +"%H:%M:%S"
> 14
> 17:00:42
> root@user1 ~ $ netstat -anp | grep 2181|grep EST| wc -l; date +"%H:%M:%S"
> 14
> 17:00:43
> root@user1 ~ $ netstat -anp | grep 2181|grep EST| wc -l; date +"%H:%M:%S"
> 16
> 17:00:46
> root@user1 ~ $ netstat -anp | grep 2181|grep EST| wc -l; date +"%H:%M:%S"
> 16
> 17:00:50
> root@user1 ~ $ netstat -anp | grep 2181|grep EST| wc -l; date +"%H:%M:%S"
> 16
> 17:00:55
> root@user1 ~ $ netstat -anp | grep 2181|grep EST| wc -l; date +"%H:%M:%S"
> 16
> 17:01:12
> root@user1 ~ $ netstat -anp | grep 2181|grep EST| wc -l; date +"%H:%M:%S"
> 16
> 17:01:18
> root@user1 ~ $ netstat -anp | grep 2181|grep EST| wc -l; date +"%H:%M:%S"
> 16
> 17:01:28
> root@user1 ~ $ netstat -anp | grep 2181|grep EST| wc -l; date +"%H:%M:%S"
> 16
> 17:01:34
> root@user1 ~ $ netstat -anp | grep 2181|grep EST| wc -l; date +"%H:%M:%S"
> 16
> 17:01:37
> root@user1 ~ $ netstat -anp | grep 2181|grep EST| wc -l; date +"%H:%M:%S"
> 16
> 17:01:39
> root@user1 ~ $ netstat -anp | grep 2181|grep EST| wc -l; date +"%H:%M:%S"
> 14
> 17:02:07



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