I try to read multiple variables synchronous from a S7-1500 and get a
exception. I use the code from the hello world example. When i split up the
variables into smaller units like 5-8 it works. any suggestion on this? Is
there a limit to the number of variables?
Gunther
String vars =
"%Q73:WORD,%Q75:WORD,%I73:WORD,%I75:WORD,%I74:WORD,%I77:WORD,%F81.1:BOOL,%Q82:REAL,%F86:INT,%F89:REAL,%I40:INT,%Q2.5:BOOL,%Q3:INT,%I66:WORD,%Q20:REAL,%I61:WORD,%Q25:WORD,%I58.0:BOOL,%F1:BYTE,%F1.0:BOOL,%F1.1:BOOL,%F1.2:BOOL,%F1.3:BOOL,%F28.0:BOOL,%I58:WORD,%F0.7:BOOL,%F0.6:BOOL,%F0.5:BOOL,%F0.4:BOOL,%F0.3:BOOL,%F0.2:BOOL,%F0.1:BOOL,%F0.0:BOOL,%F0:BYTE";
for (String item : splitVariables(vars)){
variables.add(item);
}
460 [main] INFO com.ida.moira.collector.plc4j.PLCCollectorOperatorTest -
Synchronous request ...
487 [nioEventLoopGroup-2-1] WARN 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.
io.netty.handler.codec.DecoderException: java.lang.NullPointerException
at
io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:98)
at
org.apache.plc4x.java.s7.netty.S7Protocol.channelRead(S7Protocol.java:410)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
at
io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102)
at
io.netty.handler.codec.MessageToMessageCodec.channelRead(MessageToMessageCodec.java:111)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
at
io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:310)
at
io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:284)
at
io.netty.handler.codec.ByteToMessageCodec.channelRead(ByteToMessageCodec.java:103)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
at
io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:86)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
at
io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1434)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
at
io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:965)
at
io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163)
at
io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:645)
at
io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:580)
at
io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:497)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:459)
at
io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:886)
at
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException
at
org.apache.plc4x.java.s7.netty.S7Protocol.decodeVarPayload(S7Protocol.java:608)
at
org.apache.plc4x.java.s7.netty.S7Protocol.decodePayloads(S7Protocol.java:580)
at org.apache.plc4x.java.s7.netty.S7Protocol.decode(S7Protocol.java:456)
at org.apache.plc4x.java.s7.netty.S7Protocol$1.decode(S7Protocol.java:85)
at
io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:88)
... 31 more
