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发件人:wanmin_ws <wanmin...@aliyun.com>
发送时间:2019年3月12日(星期二) 16:58
收件人:yuzhang <shifengdefan...@163.com>
主 题:回复:kylin内存溢出问题

没有做什么多余的配置,就是在查询的高峰期的时候kylin崩溃了,崩溃了肯定作业什么的都不能运行了啊。kylin.log日志是正常的,只有这一个错误信息。不然也不会排查了那么久。想请教一下,1、slow
 query多了会不会导致kylin崩溃。2、kylin的查询并发是多少? 3、是不是每一个查询都要创建一个session。
谢谢。
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发件人:yuzhang <shifengdefan...@163.com>
发送时间:2019年3月9日(星期六) 11:33
收件人:dev@kylin.apache.org <dev@kylin.apache.org>; wanmin...@aliyun.com 
<wanmin...@aliyun.com>
抄 送:wanmin...@aliyun.com <wanmin...@aliyun.com>; dev@kylin.apache.org 
<dev@kylin.apache.org>
主 题:回复:kylin内存溢出问题


 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。
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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
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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


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yuzhang
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Email:shifengdefan...@163.com
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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
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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"]




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