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Posted to issues@flink.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2016/06/02 14:17:59 UTC
[jira] [Commented] (FLINK-4011) Unable to access completed job in
web frontend
[ https://issues.apache.org/jira/browse/FLINK-4011?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15312374#comment-15312374 ]
ASF GitHub Bot commented on FLINK-4011:
---------------------------------------
GitHub user rmetzger opened a pull request:
https://github.com/apache/flink/pull/2065
[FLINK-4011] Keep UserCodeClassLoader in archived ExecutionGraphs
Currently, completed jobs cannot be accessed in the web frontend, because the classloader passed to `SerializedValue` is always null.
There are different approaches to resolve this issue:
- Use the system classloader to deserialize the EC. This means that as soon as the EC contains user code, we can not deserialize it. The web frontent will show fewer information
- In `ExecutionGraph.prepareForArchiving()`, we deserialize the EC into a special field, then we set the user code classloader free for GCing. This would be a hacky approach because we would have two ECs (serialized, regular instance) in the EG.
- Keep the usercodeclassloader in the EC. This means the classes of the job can not be unloaded from the JobManager JVM until the job has been removed from the JM history.
I'm open for discussing more approaches or alternative solutions.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/rmetzger/flink flink4011
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/2065.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #2065
----
commit 388e75c95cd4e63419af429102e8afcfcd11cb8f
Author: Robert Metzger <rm...@apache.org>
Date: 2016-06-02T14:08:07Z
[FLINK-4011] Keep UserCodeClassLoader in archived ExecutionGraphs
----
> Unable to access completed job in web frontend
> ----------------------------------------------
>
> Key: FLINK-4011
> URL: https://issues.apache.org/jira/browse/FLINK-4011
> Project: Flink
> Issue Type: Bug
> Components: Webfrontend
> Affects Versions: 1.1.0
> Reporter: Robert Metzger
> Assignee: Robert Metzger
> Priority: Critical
>
> In the current master, I'm not able to access a finished job's detail page.
> The JobManager logs shows the following exception:
> {code}
> 2016-06-02 15:23:08,581 WARN org.apache.flink.runtime.webmonitor.RuntimeMonitorHandler - Error while handling request
> java.lang.RuntimeException: Couldn't deserialize ExecutionConfig.
> at org.apache.flink.runtime.webmonitor.handlers.JobConfigHandler.handleRequest(JobConfigHandler.java:52)
> at org.apache.flink.runtime.webmonitor.handlers.AbstractExecutionGraphRequestHandler.handleRequest(AbstractExecutionGraphRequestHandler.java:61)
> at org.apache.flink.runtime.webmonitor.RuntimeMonitorHandler.respondAsLeader(RuntimeMonitorHandler.java:88)
> at org.apache.flink.runtime.webmonitor.RuntimeMonitorHandlerBase.channelRead0(RuntimeMonitorHandlerBase.java:84)
> at org.apache.flink.runtime.webmonitor.RuntimeMonitorHandlerBase.channelRead0(RuntimeMonitorHandlerBase.java:44)
> at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
> at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
> at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
> at io.netty.handler.codec.http.router.Handler.routed(Handler.java:62)
> at io.netty.handler.codec.http.router.DualAbstractHandler.channelRead0(DualAbstractHandler.java:57)
> at io.netty.handler.codec.http.router.DualAbstractHandler.channelRead0(DualAbstractHandler.java:20)
> at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
> at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
> at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
> at org.apache.flink.runtime.webmonitor.HttpRequestHandler.channelRead0(HttpRequestHandler.java:105)
> at org.apache.flink.runtime.webmonitor.HttpRequestHandler.channelRead0(HttpRequestHandler.java:65)
> at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
> at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
> at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
> at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:242)
> at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:147)
> at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
> at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
> at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:847)
> at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:131)
> at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511)
> at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)
> at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)
> at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
> at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:111)
> at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: java.lang.NullPointerException
> at org.apache.flink.util.SerializedValue.deserializeValue(SerializedValue.java:55)
> at org.apache.flink.runtime.webmonitor.handlers.JobConfigHandler.handleRequest(JobConfigHandler.java:50)
> ... 31 more
> {code}
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