回复:kylin内存溢出问题

2019-03-13 Thread wanmin_ws
   你好。
我现在不是问优化查询,是问 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? 4、不断的进行查询是否会阻塞kylin的查询实例。
--
发件人:ShaoFeng Shi 
发送时间:2019年3月13日(星期三) 18:34
收件人:dev ; wanmin_ws 
抄 送:yuzhang 
主 题:Re: kylin内存溢出问题

The slow query is a kind of warning. As the administrator, you need to analyze 
why the query was so slow; In many cases, it was due to the bad design of the 
cube, for example, the dimension sequence on Rowkey, the aggregation group, 
etc. You can search for the best practices of Kylin, or check it on the FAQ: 
https://kylin.apache.org/docs/gettingstarted/faq.html

Besides, analyze the memory dump is also recommended.

Best regards,

Shaofeng Shi 史少锋
Apache Kylin PMC
Email: shaofeng...@apache.org

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  于2019年3月13日周三 下午5:51写道:


 --
 发件人:wanmin_ws 
 发送时间:2019年3月12日(星期二) 16:58
 收件人:yuzhang 
 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。
 --
 发件人:yuzhang 
 发送时间:2019年3月9日(星期六) 11:33
 收件人:dev@kylin.apache.org ; wanmin...@aliyun.com 

 抄 送:wanmin...@aliyun.com ; 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 写道:  你好,请问能解答一下吗。
 --
 发件人:wanmin_ws 
 发送时间:2019年3月6日(星期三) 10:55
 收件人:wanmin_ws ; dev 
 抄 送:dev 
 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 
 发送时间:2019年3月5日(星期二) 17:37
 收件人:wanmin_ws 
 抄 送:dev 
 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 
 发送时间:2019年3月5日(星期二) 17:23
 收件人:dev ; wanmin_ws 
 抄 送:user 
 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  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]) bu

回复:kylin内存溢出问题

2019-03-08 Thread yuzhang
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 写道:
你好,请问能解答一下吗。
--
发件人:wanmin_ws 
发送时间:2019年3月6日(星期三) 10:55
收件人:wanmin_ws ; dev 
抄 送:dev 
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 
发送时间:2019年3月5日(星期二) 17:37
收件人:wanmin_ws 
抄 送:dev 
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 
发送时间:2019年3月5日(星期二) 17:23
收件人:dev ; wanmin_ws 
抄 送:user 
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  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"]





回复:kylin内存溢出问题

2019-03-06 Thread wanmin_ws
你好,请问能解答一下吗。
--
发件人:wanmin_ws 
发送时间:2019年3月6日(星期三) 10:55
收件人:wanmin_ws ; dev 
抄 送:dev 
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 
发送时间:2019年3月5日(星期二) 17:37
收件人:wanmin_ws 
抄 送:dev 
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 
发送时间:2019年3月5日(星期二) 17:23
收件人:dev ; wanmin_ws 
抄 送:user 
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  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"]





回复:kylin内存溢出问题

2019-03-06 Thread wanmin_ws
你好。请问能解答一下吗。
--
发件人:wanmin_ws 
发送时间:2019年3月6日(星期三) 10:55
收件人:wanmin_ws ; dev 
抄 送:dev 
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 
发送时间:2019年3月5日(星期二) 17:37
收件人:wanmin_ws 
抄 送:dev 
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 
发送时间:2019年3月5日(星期二) 17:23
收件人:dev ; wanmin_ws 
抄 送:user 
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  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"]





回复:kylin内存溢出问题

2019-03-05 Thread wanmin_ws
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 
发送时间:2019年3月5日(星期二) 17:37
收件人:wanmin_ws 
抄 送:dev 
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 
发送时间:2019年3月5日(星期二) 17:23
收件人:dev ; wanmin_ws 
抄 送:user 
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  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"]




回复:kylin内存溢出问题

2019-03-05 Thread yuzhang
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 
发送时间:2019年3月5日(星期二) 17:23
收件人:dev ; wanmin_ws 
抄 送:user 
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  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"]



回复:kylin内存溢出问题

2019-03-05 Thread wanmin_ws
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 
发送时间:2019年3月5日(星期二) 17:23
收件人:dev ; wanmin_ws 
抄 送:user 
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  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"]