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From Francisco Gonzalez Barea <Francisco.Gonza...@piksel.com>
Subject Re: Flink REST API async?
Date Thu, 19 Oct 2017 07:27:51 GMT
Hello,

Going back on this thread, quick question: Will this be supported in next Flink version? If
not, when is it expected to be included?

Regards


On 8 Aug 2017, at 15:46, Aljoscha Krettek <aljoscha@apache.org<mailto:aljoscha@apache.org>>
wrote:

I quickly talked to Till about this. The new JobManager, once FLIP-6 is implemented, will
have a new REST endpoint that allows submitting a JobGraph directly. With this, we no longer
have to execute the user main() method in the WebRuntimeMonitor (which is a component that
the current JobManager process loads to serve the web frontend and the REST interface).

This should solve the problem, but unfortunately it doesn't solve your current problem.

Best,
Aljoscha
On 8. Aug 2017, at 10:26, Francisco Gonzalez Barea <Francisco.Gonzalez@piksel.com<mailto:Francisco.Gonzalez@piksel.com>>
wrote:

Aha ok… Thanks for your answer Eron.

Regards


On 7 Aug 2017, at 19:04, Eron Wright <eronwright@gmail.com<mailto:eronwright@gmail.com>>
wrote:

When you submit a program via the REST API, the main method executes inside the JobManager
process.    Unfortunately a static variable is used to establish the execution environment
that the program obtains from `ExecutionEnvironment.getExecutionEnvironment()`.  From the
stack trace it appears that two main methods are executing simultaneously and one is corrupting
the other.

On Mon, Aug 7, 2017 at 8:21 AM, Francisco Gonzalez Barea <Francisco.Gonzalez@piksel.com<mailto:Francisco.Gonzalez@piksel.com>>
wrote:
Hi there!

We are doing some POCs submitting jobs remotely to Flink. We tried with Flink CLI and now
we´re testing the Rest API.

So the point is that when we try to execute a set of requests in an async way (using CompletableFutures)
only a couple of them run successfully. For the rest we get the exception copied at the end
of the email.

Do you know the reason for this?

Thanks in advance!!
Regards,

org.apache.flink.client.program.ProgramInvocationException: The main method caused an error.
  at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:545)
  at org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:419)
  at org.apache.flink.client.program.OptimizerPlanEnvironment.getOptimizedPlan(OptimizerPlanEnvironment.java:80)
 at org.apache.flink.client.program.ClusterClient.getOptimizedPlan(ClusterClient.java:318)
 at org.apache.flink.runtime.webmonitor.handlers.JarActionHandler.getJobGraphAndClassLoader(JarActionHandler.java:72)
 at org.apache.flink.runtime.webmonitor.handlers.JarRunHandler.handleJsonRequest(JarRunHandler.java:61)
 at org.apache.flink.runtime.webmonitor.handlers.AbstractJsonRequestHandler.handleRequest(AbstractJsonRequestHandler.java:41)
 at org.apache.flink.runtime.webmonitor.RuntimeMonitorHandler.respondAsLeader(RuntimeMonitorHandler.java:109)
 at org.apache.flink.runtime.webmonitor.RuntimeMonitorHandlerBase.channelRead0(RuntimeMonitorHandlerBase.java:97)
 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:159)
 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.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:86)
 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:748)
 \nCaused by: java.util.ConcurrentModificationException
 at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901)
 at java.util.ArrayList$Itr.next(ArrayList.java:851)
 at org.apache.flink.api.java.operators.OperatorTranslation.translateToPlan(OperatorTranslation.java:49)
 at org.apache.flink.api.java.ExecutionEnvironment.createProgramPlan(ExecutionEnvironment.java:1065)
 at org.apache.flink.api.java.ExecutionEnvironment.createProgramPlan(ExecutionEnvironment.java:1032)
 at org.apache.flink.client.program.OptimizerPlanEnvironment.execute(OptimizerPlanEnvironment.java:47)
 at com.piksel.sequoia.media.common.launcher.Launcher.main(Launcher.java:56)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:498)
 at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:528)
 ... 39 more\n”}



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