Turker TUNALI created PLC4X-245:
-----------------------------------
Summary: [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
Attachments: modbustrace_200828.pcapng
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.
Wireshark trace is attached.
*- 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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