...@gmail.com
To: user user@hbase.apache.org
Sent: Friday, December 12, 2014 11:45 AM
Subject: Re: HConnectionManager leaks with zookeeper conection oo
many
connections from /my.tomcat.server.com - max is 60
i have 10K doPost/doGet requests per second.
Servlet is NOT single
From: Serega Sheypak serega.shey...@gmail.com
To: user user@hbase.apache.org
Sent: Friday, December 12, 2014 11:45 AM
Subject: Re: HConnectionManager leaks with zookeeper conection oo
many
connections from /my.tomcat.server.com - max is 60
i have 10K doPost/doGet
@hbase.apache.org
Cc: lars hofhansl la...@apache.org
Sent: Monday, December 15, 2014 5:57 AM
Subject: Re: HConnectionManager leaks with zookeeper conection oo many
connections from /my.tomcat.server.com - max is 60
Hi, the problem is gone.
I did what you say :)
Thanks!
2014-12-13 22:38 GMT
Hm... confusing,
So here is the code path:
1. Servlet has doPost method
2. HistoryController instantiated during each doPost request.
HistoryController is Logic wrapper around low-level HBase persistence stuff
Each doPost invokes:
final HistoryController getHistoryController(){
return new
To: user user@hbase.apache.org
Sent: Friday, December 12, 2014 11:45 AM
Subject: Re: HConnectionManager leaks with zookeeper conection oo many
connections from /my.tomcat.server.com - max is 60
i have 10K doPost/doGet requests per second.
Servlet is NOT single-threaded. each doPost/doGet
with zookeeper conection oo many
connections from /my.tomcat.server.com - max is 60
i have 10K doPost/doGet requests per second.
Servlet is NOT single-threaded. each doPost/doGet
invokes these lines (encapsulated in DAO):
16 HConnection connection =
HConnectionManager.createConnection
From: Serega Sheypak serega.shey...@gmail.com
To: user user@hbase.apache.org
Sent: Friday, December 12, 2014 11:45 AM
Subject: Re: HConnectionManager leaks with zookeeper conection oo many
connections from /my.tomcat.server.com - max is 60
i have 10K doPost/doGet requests per second
leaks with zookeeper conection oo many
connections from /my.tomcat.server.com - max is 60
i have 10K doPost/doGet requests per second.
Servlet is NOT single-threaded. each doPost/doGet
invokes these lines (encapsulated in DAO):
16 HConnection connection
Hi, I'm using HConnectionManager from java servlet
Looks like it's leaking, all my zookeepers complains that there is too many
connections from servlet hosts.
Typical line from lZK log:
oo many connections from /my.tomcat.server.com - max is 60
Here is code sample
public class BaseConnection
Does zk count go up on each request to the servlet? Which version of hbase
so can try on this end? Do you have some client-side log? Better if you
cache the connection rather than make it each time since setup is costly
but lets fix first problem first.
St.Ack
On Fri, Dec 12, 2014 at 2:47 AM,
Hi, I'm using CDH 5.2, 0.98
I don't know how to use it correctly. I've just used this sample:
https://hbase.apache.org/apidocs/org/apache/hadoop/hbase/client/HConnectionManager.html
HConnection connection = HConnectionManager.createConnection(config);
HTableInterface table =
I cannot reproduce. I stood up a cdh5.2 server and then copy/pasted your
code adding in a put for each cycle. I ran loop 1000 times and no
complaint from zk.
Tell me more (Is servlet doing single-threaded model? A single
Configuration is being used or new ones are being created per servlet
i have 10K doPost/doGet requests per second.
Servlet is NOT single-threaded. each doPost/doGet
invokes these lines (encapsulated in DAO):
16 HConnection connection =
HConnectionManager.createConnection(config);
17 HTableInterface table =
On Fri, Dec 12, 2014 at 11:45 AM, Serega Sheypak serega.shey...@gmail.com
wrote:
i have 10K doPost/doGet requests per second.
How many concurrent threads going on in your tomcat? Is the Connection
shared amongst all threads? Perhaps you have 60 concurrent connections
running at a time and
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