Hi, wanmin
I am interested in this problem and making some research on it.
When the query kylin instance down, are the job and all instances running
normally? The most number of concurrents are query request? Have you ever
redeploy or shutdown kylin web app by hand before the exception occured? Any
extra configurations have been set in tomcat?
As shishaofeng said, the log information is limited. More log or the way to
reproduce the error will be helpful.
Best regards
yuzhang
| |
yuzhang
|
|
shifengdefan...@163.com
|
签名由网易邮箱大师定制
在2019年3月7日 11:08，wanmin_ws<wanmin...@aliyun.com.INVALID> 写道：
你好，请问能解答一下吗。
------------------------------------------------------------------
发件人：wanmin_ws <wanmin...@aliyun.com>
发送时间：2019年3月6日(星期三) 10:55
收件人：wanmin_ws <wanmin...@aliyun.com.INVALID>; dev <dev@kylin.apache.org>
抄 送：dev <dev@kylin.apache.org>
主 题：回复：kylin内存溢出问题
kylin 2.5.0 大数据平台HDP，一共5台kylin节点，一台all，一台job，三台query节点。
挂掉的都是query节点，但是这个错误在5个节点上都有报
------------------------------------------------------------------
发件人：yuzhang <shifengdefan...@163.com>
发送时间：2019年3月5日(星期二) 17:37
收件人：wanmin_ws <wanmin...@aliyun.com.INVALID>
抄 送：dev <dev@kylin.apache.org>
主 题：回复：kylin内存溢出问题
Hi, Could you describe your deploy environment and Kylie version and Number of
concurrent
| |
yuzhang
|
|
Email:shifengdefan...@163.com
|
Signature is customized by Netease Mail Master
在2019年03月05日 17:27，wanmin_ws 写道：
只有查询高峰期的时候会出现这个问题，这个问题和slow query
有没有关系？这个错是kylin.out报出来的，显示是tomcat不能开启更多的session
------------------------------------------------------------------
发件人：ShaoFeng Shi <shaofeng...@apache.org>
发送时间：2019年3月5日(星期二) 17:23
收件人：dev <dev@kylin.apache.org>; wanmin_ws <wanmin...@aliyun.com>
抄 送：user <u...@kylin.apache.org>
主 题：Re: kylin内存溢出问题
Hi Min,
The log information is so limited that we don't know what may caused that.
I highly recommend you to do some analysis from the following perspective:
1) check the log files in "logs/" and "tomcat/logs" folder;
2) using jmap and jhat to analysis the heap usage;
3) using jstack to analysis the thread information;
4) check your cube definition to see whether there is some UHC dimension
and the dictionary encoding was used for that.
Best regards,
Shaofeng Shi 史少锋
Apache Kylin PMC
Work email: shaofeng....@kyligence.io
Kyligence Inc: https://kyligence.io/
Apache Kylin FAQ: https://kylin.apache.org/docs/gettingstarted/faq.html
Join Kylin user mail group: user-subscr...@kylin.apache.org
Join Kylin dev mail group: dev-subscr...@kylin.apache.org
wanmin_ws <wanmin...@aliyun.com.invalid> 于2019年3月5日周二 下午5:03写道：
错误描述：在访问高峰期的时候，kylin会挂掉，查看日志如下，但不知道如何操作，请问能帮我看一下吗。这个问题已经困扰很久了。
日志：
严重: The web application [/kylin] created a ThreadLocal with key of type
[java.lang.ThreadLocal] (value [java.lang.ThreadLocal@6cc63032]) and a
value of type [org.apache.kylin.rest.msg.Message] (value
[org.apache.kylin.rest.msg.Message@3ad18e2f]) but failed to remove it
when the web application was stopped. Threads are going to be renewed over
time to try and avoid a probable memory leak.
三月 01, 2019 9:50:52 上午 org.apache.catalina.loader.WebappClassLoaderBase
checkThreadLocalMapForLeaks
严重: The web application [/kylin] created a ThreadLocal with key of type
[java.lang.ThreadLocal] (value [java.lang.ThreadLocal@76397470]) and a
value of type [org.apache.kylin.common.util.ImplementationSwitch] (value
[org.apache.kylin.common.util.ImplementationSwitch@26f33af5]) but failed
to remove it when the web application was stopped. Threads are going to be
renewed over time to try and avoid a probable memory leak.
三月 01, 2019 9:50:52 上午 org.apache.coyote.AbstractProtocol stop
信息: Stopping ProtocolHandler ["http-bio-7070"]
三月 01, 2019 9:50:52 上午 org.apache.coyote.AbstractProtocol stop
信息: Stopping ProtocolHandler ["ajp-bio-9009"]
