Hi all, I've setup my NiFi instance with the "plc4j-nifi-plc4x-nar-0.7.0.nar" file. (Source: https://mvnrepository.com/artifact/org.apache.plc4x/plc4j-nifi-plc4x-nar/0.7.0 )
My Plc4xSourceProcessor's, PLC connection String is "modbus:tcp:// 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. Should I create a detailed Jira Issue? *- 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) Saygılarımla / With kind regards / Mit freundlichen Grüßen Türker TUNALI Logedosoft Business Solutions M +90 545 788 48 78 [image: Logo] <https://www.logedosoft.com/>
