[
https://issues.apache.org/jira/browse/PLC4X-245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17191283#comment-17191283
]
Turker TUNALI commented on PLC4X-245:
-------------------------------------
Today I've tried with the latest nar file
"plc4j-nifi-plc4x-nar-0.8.0-20200902.153322-1"
I still got "org.apache.nifi.processor.exception.ProcessException: Got an error
while trying to get a connection" exception.
Exception details:
2020-09-06 17:15:15,901 ERROR [Timer-Driven Process Thread-5]
o.apache.plc4x.nifi.Plc4xSourceProcessor
Plc4xSourceProcessor[id=63c2c1f9-0174-1000-eb3b-2e4a85319f90] Failed to process
session due to org.apache.nifi.processor.exception.ProcessException: Got an
error while trying to get a connection:
org.apache.nifi.processor.exception.ProcessException: Got an error while trying
to get a connection
org.apache.nifi.processor.exception.ProcessException: Got an error while trying
to get a connection
at
org.apache.plc4x.nifi.Plc4xSourceProcessor.onTrigger(Plc4xSourceProcessor.java:85)
at
org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:27)
at
org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1174)
at
org.apache.nifi.controller.tasks.ConnectableTask.invoke(ConnectableTask.java:213)
at
org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:117)
at org.apache.nifi.engine.FlowEngine$2.run(FlowEngine.java:110)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.runAndReset(Unknown Source)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(Unknown
Source)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown
Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Then I also tried it with 0.7.0 and I got an null pointer exception. (Modbus
Poll can still read values)
2020-09-06 17:21:44,243 ERROR [Timer-Driven Process Thread-10]
o.apache.plc4x.nifi.Plc4xSourceProcessor
Plc4xSourceProcessor[id=2f12f5b4-0174-1000-724e-a53ba0fc1652]
Plc4xSourceProcessor[id=2f12f5b4-0174-1000-724e-a53ba0fc1652] failed to process
session due to java.lang.NullPointerException; Processor Administratively
Yielded for 1 sec: java.lang.NullPointerException
java.lang.NullPointerException: null
at
org.apache.plc4x.nifi.Plc4xSourceProcessor.onTrigger(Plc4xSourceProcessor.java:50)
at
org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:27)
at
org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1174)
at
org.apache.nifi.controller.tasks.ConnectableTask.invoke(ConnectableTask.java:213)
at
org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:117)
at org.apache.nifi.engine.FlowEngine$2.run(FlowEngine.java:110)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.runAndReset(Unknown Source)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(Unknown
Source)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown
Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
2020-09-06 17:21:44,243 WARN [Timer-Driven Process Thread-10]
o.a.n.controller.tasks.ConnectableTask Administratively Yielding
Plc4xSourceProcessor[id=2f12f5b4-0174-1000-724e-a53ba0fc1652] due to uncaught
Exception: java.lang.NullPointerException
java.lang.NullPointerException: null
at
org.apache.plc4x.nifi.Plc4xSourceProcessor.onTrigger(Plc4xSourceProcessor.java:50)
at
org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:27)
at
org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1174)
at
org.apache.nifi.controller.tasks.ConnectableTask.invoke(ConnectableTask.java:213)
at
org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:117)
at org.apache.nifi.engine.FlowEngine$2.run(FlowEngine.java:110)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.runAndReset(Unknown Source)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(Unknown
Source)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown
Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
> [Modbus] Apache NiFi processor throws java.io.IOException after a while
> -----------------------------------------------------------------------
>
> Key: PLC4X-245
> URL: https://issues.apache.org/jira/browse/PLC4X-245
> Project: Apache PLC4X
> Issue Type: Bug
> Components: Driver-Modbus, Integration-NiFi
> Affects Versions: 0.7.0
> Environment: Apache NiFi 1.12.0, Win2012 Server, PLX4X Nar 0.7.0
> (https://mvnrepository.com/artifact/org.apache.plc4x/plc4j-nifi-plc4x-nar/0.7.0)
> Reporter: Turker TUNALI
> Priority: Major
> Attachments: modbustrace_200828.pcapng, modbustrace_200828_4.pcapng
>
> Original Estimate: 48h
> Remaining Estimate: 48h
>
> My Plc4xSourceProcessor's, PLC connection String is
> "modbus:tcp://[10.0.2.238:502?slave=1|http://10.0.2.238:502/?slave=1]"; and
> PLC resource address String is "test1=holding-register:1"
>
> I can get the values for 5-10 times with 5 second intervals but then I get
> below exception. I can read the values with the Modbus Poll application, so
> most probably the PLC4X side has a problem.
>
> I may also get some other exceptions when starting the processor, which are
> also below.
>
> PS: Wireshark trace is attached. I've read 16 times then I get the exception.
>
> *
> -- This is the exception which I get after some successful read operations.*
> 2020-08-27 13:19:06,091 WARN [nioEventLoopGroup-8-1]
> io.netty.channel.DefaultChannelPipeline An exceptionCaught() event was fired,
> and it reached at the tail of the pipeline. It usually means the last handler
> in the pipeline did not handle the exception.
> java.io.IOException: An existing connection was forcibly closed by the
> remote host
> at sun.nio.ch.SocketDispatcher.read0(Native Method)
> at sun.nio.ch.SocketDispatcher.read(Unknown Source)
> at sun.nio.ch.IOUtil.readIntoNativeBuffer(Unknown Source)
> at sun.nio.ch.IOUtil.read(Unknown Source)
> at sun.nio.ch.SocketChannelImpl.read(Unknown Source)
> at io.netty.buffer.PooledByteBuf.setBytes(PooledByteBuf.java:253)
> at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1133)
> at
> io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:350)
> at
> io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:148)
> at
> io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:714)
> at
> io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650)
> at
> io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576)
> at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)
> at
> io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
> at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
> at
> io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
> at java.lang.Thread.run(Unknown Source)
>
>
> -- This is the exception which I get sometimes when starting up the
> processor.*
> 2020-08-27 13:17:16,813 WARN [Timer-Driven Process Thread-11]
> o.a.n.controller.tasks.ConnectableTask Administratively Yielding
> Plc4xSourceProcessor[id=2f12f5b4-0174-1000-724e-a53ba0fc1652] due to uncaught
> Exception: java.lang.NullPointerException
> java.lang.NullPointerException: null
> at
> org.apache.plc4x.nifi.Plc4xSourceProcessor.onTrigger(Plc4xSourceProcessor.java:50)
> at
> org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:27)
> at
> org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1174)
> at
> org.apache.nifi.controller.tasks.ConnectableTask.invoke(ConnectableTask.java:213)
> at
> org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:117)
> at org.apache.nifi.engine.FlowEngine$2.run(FlowEngine.java:110)
> at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
> at java.util.concurrent.FutureTask.runAndReset(Unknown Source)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(Unknown
> Source)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown
> Source)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
> at java.lang.Thread.run(Unknown Source)
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