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From Francisco Gonzalez Barea <Francisco.Gonza...@piksel.com>
Subject Re: Flink REST API async?
Date Tue, 08 Aug 2017 08:26:26 GMT
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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