ProcessFunction example from the documentation giving me error

[anna stax]

Hi all,

I am new to Flink. I am using the classes CountWithTimestamp and CountWithTimeoutFunction from the examples found in 

https://ci.apache.org/projects/flink/flink-docs-release-1.5/dev/stream/operators/process_function.html

I am getting the error Exception in thread "main" org.apache.flink.runtime.client.JobExecutionException: java.net.ConnectException: Operation timed out (Connection timed out)

Looks like when timer’s time is reached I am getting this error. Any idea why. Please help

Thanks

[vino yang]

Hi anna,

Can you share your program and the exception stack trace and more details about what's your source and state backend?

From the information you provided, it seems Flink started a network connect but timed out. 

Thanks, vino.

2018-07-20 14:14 GMT+08:00 anna stax <[hidden email]>:

Hi all,

I am new to Flink. I am using the classes CountWithTimestamp and CountWithTimeoutFunction from the examples found in 

https://ci.apache.org/projects/flink/flink-docs-release-1.5/dev/stream/operators/process_function.html

I am getting the error Exception in thread "main" org.apache.flink.runtime.client.JobExecutionException: java.net.ConnectException: Operation timed out (Connection timed out)

Looks like when timer’s time is reached I am getting this error. Any idea why. Please help

Thanks

[anna stax]

Hello all,

This is my code, just trying to make the code example in https://ci.apache.org/projects/flink/flink-docs-release-1.5/dev/stream/operators/process_function.html work

object ProcessFunctionTest {

  def main(args: Array[String]) {

    val env = StreamExecutionEnvironment.getExecutionEnvironment

    env.setStreamTimeCharacteristic(TimeCharacteristic.ProcessingTime)

    val text = env.socketTextStream("localhost", 9999)

    val text1 = text.map(s => (s,s)).keyBy(0).process(new CountWithTimeoutFunction())

    text1.print()

    env.execute("CountWithTimeoutFunction")

  }

  case class CountWithTimestamp(key: String, count: Long, lastModified: Long)

  class CountWithTimeoutFunction extends ProcessFunction[(String, String), (String, Long)] {

    lazy val state: ValueState[CountWithTimestamp] = getRuntimeContext

      .getState(new ValueStateDescriptor[CountWithTimestamp]("myState", classOf[CountWithTimestamp]))

    override def processElement(value: (String, String), ctx: ProcessFunction[(String, String), (String, Long)]#Context, out: Collector[(String, Long)]): Unit = {

    ......

    }

    override def onTimer(timestamp: Long, ctx: ProcessFunction[(String, String), (String, Long)]#OnTimerContext, out: Collector[(String, Long)]): Unit = {

    .......

    }

  }

}

Exception in thread "main" org.apache.flink.runtime.client.JobExecutionException: java.net.ConnectException: Operation timed out (Connection timed out)

at org.apache.flink.runtime.minicluster.MiniCluster.executeJobBlocking(MiniCluster.java:625)

at org.apache.flink.streaming.api.environment.LocalStreamEnvironment.execute(LocalStreamEnvironment.java:121)

at org.apache.flink.streaming.api.scala.StreamExecutionEnvironment.execute(StreamExecutionEnvironment.scala:654)

at com.whil.flink.streaming.CreateUserNotificationRequests$.main(CreateUserNotificationRequests.scala:42)

at com.whil.flink.streaming.CreateUserNotificationRequests.main(CreateUserNotificationRequests.scala)

Caused by: java.net.ConnectException: Operation timed out (Connection timed out)

at java.net.PlainSocketImpl.socketConnect(Native Method)

at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)

at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)

at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)

at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)

at java.net.Socket.connect(Socket.java:589)

at org.apache.flink.streaming.api.functions.source.SocketTextStreamFunction.run(SocketTextStreamFunction.java:96)

at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:87)

at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:56)

at org.apache.flink.streaming.runtime.tasks.SourceStreamTask.run(SourceStreamTask.java:99)

at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:306)

at org.apache.flink.runtime.taskmanager.Task.run(Task.java:703)

at java.lang.Thread.run(Thread.java:745)

On Thu, Jul 19, 2018 at 11:22 PM, vino yang <[hidden email]> wrote:

Hi anna,

Can you share your program and the exception stack trace and more details about what's your source and state backend?

From the information you provided, it seems Flink started a network connect but timed out. 

Thanks, vino.

2018-07-20 14:14 GMT+08:00 anna stax <[hidden email]>:

Hi all,

I am new to Flink. I am using the classes CountWithTimestamp and CountWithTimeoutFunction from the examples found in 

https://ci.apache.org/projects/flink/flink-docs-release-1.5/dev/stream/operators/process_function.html

I am getting the error Exception in thread "main" org.apache.flink.runtime.client.JobExecutionException: java.net.ConnectException: Operation timed out (Connection timed out)

Looks like when timer’s time is reached I am getting this error. Any idea why. Please help

Thanks

[anna stax]

My object name is  CreateUserNotificationRequests, thats why  you see CreateUserNotificationRequests in the Error message.

I edited the object name after pasting the code...Hope there is no confusion and I get some help.

Thanks

On Fri, Jul 20, 2018 at 10:10 AM, anna stax <[hidden email]> wrote:

Hello all,

This is my code, just trying to make the code example in https://ci.apache.org/projects/flink/flink-docs-release-1.5/dev/stream/operators/process_function.html work

object ProcessFunctionTest {

  def main(args: Array[String]) {

    val env = StreamExecutionEnvironment.getExecutionEnvironment

    env.setStreamTimeCharacteristic(TimeCharacteristic.ProcessingTime)

    val text = env.socketTextStream("localhost", 9999)

    val text1 = text.map(s => (s,s)).keyBy(0).process(new CountWithTimeoutFunction())

    text1.print()

    env.execute("CountWithTimeoutFunction")

  }

  case class CountWithTimestamp(key: String, count: Long, lastModified: Long)

  class CountWithTimeoutFunction extends ProcessFunction[(String, String), (String, Long)] {

    lazy val state: ValueState[CountWithTimestamp] = getRuntimeContext

      .getState(new ValueStateDescriptor[CountWithTimestamp]("myState", classOf[CountWithTimestamp]))

    override def processElement(value: (String, String), ctx: ProcessFunction[(String, String), (String, Long)]#Context, out: Collector[(String, Long)]): Unit = {

    ......

    }

    override def onTimer(timestamp: Long, ctx: ProcessFunction[(String, String), (String, Long)]#OnTimerContext, out: Collector[(String, Long)]): Unit = {

    .......

    }

  }

}

Exception in thread "main" org.apache.flink.runtime.client.JobExecutionException: java.net.ConnectException: Operation timed out (Connection timed out)

at org.apache.flink.runtime.minicluster.MiniCluster.executeJobBlocking(MiniCluster.java:625)

at org.apache.flink.streaming.api.environment.LocalStreamEnvironment.execute(LocalStreamEnvironment.java:121)

at org.apache.flink.streaming.api.scala.StreamExecutionEnvironment.execute(StreamExecutionEnvironment.scala:654)

at com.whil.flink.streaming.CreateUserNotificationRequests$.main(CreateUserNotificationRequests.scala:42)

at com.whil.flink.streaming.CreateUserNotificationRequests.main(CreateUserNotificationRequests.scala)

Caused by: java.net.ConnectException: Operation timed out (Connection timed out)

at java.net.PlainSocketImpl.socketConnect(Native Method)

at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)

at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)

at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)

at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)

at java.net.Socket.connect(Socket.java:589)

at org.apache.flink.streaming.api.functions.source.SocketTextStreamFunction.run(SocketTextStreamFunction.java:96)

at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:87)

at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:56)

at org.apache.flink.streaming.runtime.tasks.SourceStreamTask.run(SourceStreamTask.java:99)

at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:306)

at org.apache.flink.runtime.taskmanager.Task.run(Task.java:703)

at java.lang.Thread.run(Thread.java:745)

On Thu, Jul 19, 2018 at 11:22 PM, vino yang <[hidden email]> wrote:

Hi anna,

Can you share your program and the exception stack trace and more details about what's your source and state backend?

From the information you provided, it seems Flink started a network connect but timed out. 

Thanks, vino.

2018-07-20 14:14 GMT+08:00 anna stax <[hidden email]>:

Hi all,

I am new to Flink. I am using the classes CountWithTimestamp and CountWithTimeoutFunction from the examples found in 

https://ci.apache.org/projects/flink/flink-docs-release-1.5/dev/stream/operators/process_function.html

I am getting the error Exception in thread "main" org.apache.flink.runtime.client.JobExecutionException: java.net.ConnectException: Operation timed out (Connection timed out)

Looks like when timer’s time is reached I am getting this error. Any idea why. Please help

Thanks

[anna stax]

It is not the code, but I don't know what the problem is. 

A simple word count with  socketTextStream used to work but now gives the same error. 

Apps with kafka source which used to work is giving the same error.

When I have a source generator within the app itself works good.

So, with socketTextStream and kafka source gives me

java.net.ConnectException: Operation timed out (Connection timed out)  error

On Fri, Jul 20, 2018 at 10:29 AM, anna stax <[hidden email]> wrote:

My object name is  CreateUserNotificationRequests, thats why  you see CreateUserNotificationRequests in the Error message.

I edited the object name after pasting the code...Hope there is no confusion and I get some help.

Thanks

On Fri, Jul 20, 2018 at 10:10 AM, anna stax <[hidden email]> wrote:

Hello all,

This is my code, just trying to make the code example in https://ci.apache.org/projects/flink/flink-docs-release-1.5/dev/stream/operators/process_function.html work

object ProcessFunctionTest {

  def main(args: Array[String]) {

    val env = StreamExecutionEnvironment.getExecutionEnvironment

    env.setStreamTimeCharacteristic(TimeCharacteristic.ProcessingTime)

    val text = env.socketTextStream("localhost", 9999)

    val text1 = text.map(s => (s,s)).keyBy(0).process(new CountWithTimeoutFunction())

    text1.print()

    env.execute("CountWithTimeoutFunction")

  }

  case class CountWithTimestamp(key: String, count: Long, lastModified: Long)

  class CountWithTimeoutFunction extends ProcessFunction[(String, String), (String, Long)] {

    lazy val state: ValueState[CountWithTimestamp] = getRuntimeContext

      .getState(new ValueStateDescriptor[CountWithTimestamp]("myState", classOf[CountWithTimestamp]))

    override def processElement(value: (String, String), ctx: ProcessFunction[(String, String), (String, Long)]#Context, out: Collector[(String, Long)]): Unit = {

    ......

    }

    override def onTimer(timestamp: Long, ctx: ProcessFunction[(String, String), (String, Long)]#OnTimerContext, out: Collector[(String, Long)]): Unit = {

    .......

    }

  }

}

Exception in thread "main" org.apache.flink.runtime.client.JobExecutionException: java.net.ConnectException: Operation timed out (Connection timed out)

at org.apache.flink.runtime.minicluster.MiniCluster.executeJobBlocking(MiniCluster.java:625)

at org.apache.flink.streaming.api.environment.LocalStreamEnvironment.execute(LocalStreamEnvironment.java:121)

at org.apache.flink.streaming.api.scala.StreamExecutionEnvironment.execute(StreamExecutionEnvironment.scala:654)

at com.whil.flink.streaming.CreateUserNotificationRequests$.main(CreateUserNotificationRequests.scala:42)

at com.whil.flink.streaming.CreateUserNotificationRequests.main(CreateUserNotificationRequests.scala)

Caused by: java.net.ConnectException: Operation timed out (Connection timed out)

at java.net.PlainSocketImpl.socketConnect(Native Method)

at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)

at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)

at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)

at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)

at java.net.Socket.connect(Socket.java:589)

at org.apache.flink.streaming.api.functions.source.SocketTextStreamFunction.run(SocketTextStreamFunction.java:96)

at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:87)

at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:56)

at org.apache.flink.streaming.runtime.tasks.SourceStreamTask.run(SourceStreamTask.java:99)

at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:306)

at org.apache.flink.runtime.taskmanager.Task.run(Task.java:703)

at java.lang.Thread.run(Thread.java:745)

On Thu, Jul 19, 2018 at 11:22 PM, vino yang <[hidden email]> wrote:

Hi anna,

Can you share your program and the exception stack trace and more details about what's your source and state backend?

From the information you provided, it seems Flink started a network connect but timed out. 

Thanks, vino.

2018-07-20 14:14 GMT+08:00 anna stax <[hidden email]>:

Hi all,

I am new to Flink. I am using the classes CountWithTimestamp and CountWithTimeoutFunction from the examples found in 

https://ci.apache.org/projects/flink/flink-docs-release-1.5/dev/stream/operators/process_function.html

I am getting the error Exception in thread "main" org.apache.flink.runtime.client.JobExecutionException: java.net.ConnectException: Operation timed out (Connection timed out)

Looks like when timer’s time is reached I am getting this error. Any idea why. Please help

Thanks

[vino yang]

Hi anna,

From the stack trace you provided, it's socket connect error not about Flink.

So, Have you start a socket server at "localhost:9999"? Using a program or CLI tool, such as "nc -l 9999"

There is a example you can have a look[1].

[1]: https://ci.apache.org/projects/flink/flink-docs-release-1.5/quickstart/setup_quickstart.html#run-the-example

Thanks, vino.

2018-07-21 4:30 GMT+08:00 anna stax <[hidden email]>:

It is not the code, but I don't know what the problem is. 

A simple word count with  socketTextStream used to work but now gives the same error. 

Apps with kafka source which used to work is giving the same error.

When I have a source generator within the app itself works good.

So, with socketTextStream and kafka source gives me

java.net.ConnectException: Operation timed out (Connection timed out)  error

On Fri, Jul 20, 2018 at 10:29 AM, anna stax <[hidden email]> wrote:

My object name is  CreateUserNotificationRequests, thats why  you see CreateUserNotificationRequests in the Error message.

I edited the object name after pasting the code...Hope there is no confusion and I get some help.

Thanks

On Fri, Jul 20, 2018 at 10:10 AM, anna stax <[hidden email]> wrote:

Hello all,

This is my code, just trying to make the code example in https://ci.apache.org/projects/flink/flink-docs-release-1.5/dev/stream/operators/process_function.html work

object ProcessFunctionTest {

  def main(args: Array[String]) {

    val env = StreamExecutionEnvironment.getExecutionEnvironment

    env.setStreamTimeCharacteristic(TimeCharacteristic.ProcessingTime)

    val text = env.socketTextStream("localhost", 9999)

    val text1 = text.map(s => (s,s)).keyBy(0).process(new CountWithTimeoutFunction())

    text1.print()

    env.execute("CountWithTimeoutFunction")

  }

  case class CountWithTimestamp(key: String, count: Long, lastModified: Long)

  class CountWithTimeoutFunction extends ProcessFunction[(String, String), (String, Long)] {

    lazy val state: ValueState[CountWithTimestamp] = getRuntimeContext

      .getState(new ValueStateDescriptor[CountWithTimestamp]("myState", classOf[CountWithTimestamp]))

    override def processElement(value: (String, String), ctx: ProcessFunction[(String, String), (String, Long)]#Context, out: Collector[(String, Long)]): Unit = {

    ......

    }

    override def onTimer(timestamp: Long, ctx: ProcessFunction[(String, String), (String, Long)]#OnTimerContext, out: Collector[(String, Long)]): Unit = {

    .......

    }

  }

}

Exception in thread "main" org.apache.flink.runtime.client.JobExecutionException: java.net.ConnectException: Operation timed out (Connection timed out)

at org.apache.flink.runtime.minicluster.MiniCluster.executeJobBlocking(MiniCluster.java:625)

at org.apache.flink.streaming.api.environment.LocalStreamEnvironment.execute(LocalStreamEnvironment.java:121)

at org.apache.flink.streaming.api.scala.StreamExecutionEnvironment.execute(StreamExecutionEnvironment.scala:654)

at com.whil.flink.streaming.CreateUserNotificationRequests$.main(CreateUserNotificationRequests.scala:42)

at com.whil.flink.streaming.CreateUserNotificationRequests.main(CreateUserNotificationRequests.scala)

Caused by: java.net.ConnectException: Operation timed out (Connection timed out)

at java.net.PlainSocketImpl.socketConnect(Native Method)

at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)

at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)

at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)

at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)

at java.net.Socket.connect(Socket.java:589)

at org.apache.flink.streaming.api.functions.source.SocketTextStreamFunction.run(SocketTextStreamFunction.java:96)

at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:87)

at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:56)

at org.apache.flink.streaming.runtime.tasks.SourceStreamTask.run(SourceStreamTask.java:99)

at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:306)

at org.apache.flink.runtime.taskmanager.Task.run(Task.java:703)

at java.lang.Thread.run(Thread.java:745)

On Thu, Jul 19, 2018 at 11:22 PM, vino yang <[hidden email]> wrote:

Hi anna,

Can you share your program and the exception stack trace and more details about what's your source and state backend?

From the information you provided, it seems Flink started a network connect but timed out. 

Thanks, vino.

2018-07-20 14:14 GMT+08:00 anna stax <[hidden email]>:

Hi all,

I am new to Flink. I am using the classes CountWithTimestamp and CountWithTimeoutFunction from the examples found in 

https://ci.apache.org/projects/flink/flink-docs-release-1.5/dev/stream/operators/process_function.html

I am getting the error Exception in thread "main" org.apache.flink.runtime.client.JobExecutionException: java.net.ConnectException: Operation timed out (Connection timed out)

Looks like when timer’s time is reached I am getting this error. Any idea why. Please help

Thanks

[anna stax]

It is good now. Sorry, my fault. I had multiple applications running and both were using the socket stream . Thanks.

On Sun, Jul 22, 2018 at 8:22 PM, vino yang <[hidden email]> wrote:

Hi anna,

From the stack trace you provided, it's socket connect error not about Flink.

So, Have you start a socket server at "localhost:9999"? Using a program or CLI tool, such as "nc -l 9999"

There is a example you can have a look[1].

[1]: https://ci.apache.org/projects/flink/flink-docs-release-1.5/quickstart/setup_quickstart.html#run-the-example

Thanks, vino.

2018-07-21 4:30 GMT+08:00 anna stax <[hidden email]>:

It is not the code, but I don't know what the problem is. 

A simple word count with  socketTextStream used to work but now gives the same error. 

Apps with kafka source which used to work is giving the same error.

When I have a source generator within the app itself works good.

So, with socketTextStream and kafka source gives me

java.net.ConnectException: Operation timed out (Connection timed out)  error

On Fri, Jul 20, 2018 at 10:29 AM, anna stax <[hidden email]> wrote:

My object name is  CreateUserNotificationRequests, thats why  you see CreateUserNotificationRequests in the Error message.

I edited the object name after pasting the code...Hope there is no confusion and I get some help.

Thanks

On Fri, Jul 20, 2018 at 10:10 AM, anna stax <[hidden email]> wrote:

Hello all,

This is my code, just trying to make the code example in https://ci.apache.org/projects/flink/flink-docs-release-1.5/dev/stream/operators/process_function.html work

object ProcessFunctionTest {

  def main(args: Array[String]) {

    val env = StreamExecutionEnvironment.getExecutionEnvironment

    env.setStreamTimeCharacteristic(TimeCharacteristic.ProcessingTime)

    val text = env.socketTextStream("localhost", 9999)

    val text1 = text.map(s => (s,s)).keyBy(0).process(new CountWithTimeoutFunction())

    text1.print()

    env.execute("CountWithTimeoutFunction")

  }

  case class CountWithTimestamp(key: String, count: Long, lastModified: Long)

  class CountWithTimeoutFunction extends ProcessFunction[(String, String), (String, Long)] {

    lazy val state: ValueState[CountWithTimestamp] = getRuntimeContext

      .getState(new ValueStateDescriptor[CountWithTimestamp]("myState", classOf[CountWithTimestamp]))

    override def processElement(value: (String, String), ctx: ProcessFunction[(String, String), (String, Long)]#Context, out: Collector[(String, Long)]): Unit = {

    ......

    }

    override def onTimer(timestamp: Long, ctx: ProcessFunction[(String, String), (String, Long)]#OnTimerContext, out: Collector[(String, Long)]): Unit = {

    .......

    }

  }

}

Exception in thread "main" org.apache.flink.runtime.client.JobExecutionException: java.net.ConnectException: Operation timed out (Connection timed out)

at org.apache.flink.runtime.minicluster.MiniCluster.executeJobBlocking(MiniCluster.java:625)

at org.apache.flink.streaming.api.environment.LocalStreamEnvironment.execute(LocalStreamEnvironment.java:121)

at org.apache.flink.streaming.api.scala.StreamExecutionEnvironment.execute(StreamExecutionEnvironment.scala:654)

at com.whil.flink.streaming.CreateUserNotificationRequests$.main(CreateUserNotificationRequests.scala:42)

at com.whil.flink.streaming.CreateUserNotificationRequests.main(CreateUserNotificationRequests.scala)

Caused by: java.net.ConnectException: Operation timed out (Connection timed out)

at java.net.PlainSocketImpl.socketConnect(Native Method)

at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)

at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)

at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)

at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)

at java.net.Socket.connect(Socket.java:589)

at org.apache.flink.streaming.api.functions.source.SocketTextStreamFunction.run(SocketTextStreamFunction.java:96)

at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:87)

at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:56)

at org.apache.flink.streaming.runtime.tasks.SourceStreamTask.run(SourceStreamTask.java:99)

at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:306)

at org.apache.flink.runtime.taskmanager.Task.run(Task.java:703)

at java.lang.Thread.run(Thread.java:745)

On Thu, Jul 19, 2018 at 11:22 PM, vino yang <[hidden email]> wrote:

Hi anna,

Can you share your program and the exception stack trace and more details about what's your source and state backend?

From the information you provided, it seems Flink started a network connect but timed out. 

Thanks, vino.

2018-07-20 14:14 GMT+08:00 anna stax <[hidden email]>:

Hi all,

I am new to Flink. I am using the classes CountWithTimestamp and CountWithTimeoutFunction from the examples found in 

https://ci.apache.org/projects/flink/flink-docs-release-1.5/dev/stream/operators/process_function.html

I am getting the error Exception in thread "main" org.apache.flink.runtime.client.JobExecutionException: java.net.ConnectException: Operation timed out (Connection timed out)

Looks like when timer’s time is reached I am getting this error. Any idea why. Please help

Thanks