[
https://issues.apache.org/jira/browse/PLC4X-163?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16998088#comment-16998088
]
Julian Feinauer commented on PLC4X-163:
---------------------------------------
Hi [~swiendl] this is a really serious bug, that we did not encounter yet. We
are sitting here together to refactor the core completely to avoid this type of
bugs. So we hope to fix it till the end of this week!
> Netty OutOfDirectMemoryError
> ----------------------------
>
> Key: PLC4X-163
> URL: https://issues.apache.org/jira/browse/PLC4X-163
> Project: Apache PLC4X
> Issue Type: Bug
> Components: Util-Scraper
> Affects Versions: 0.5.0
> Environment: Ubuntu 16.04 LTS
> Java 1.8.0_201
> {code}$ java -XX:+PrintFlagsFinal -version | grep -iE
> 'HeapSize|PermSize|ThreadStackSize'
> intx CompilerThreadStackSize = 0
> {pd product}
> uintx ErgoHeapSizeLimit = 0
> {product}
> uintx HeapSizePerGCThread = 87241520
> {product}
> uintx InitialHeapSize := 132120576
> {product}
> uintx LargePageHeapSizeThreshold = 134217728
> {product}
> uintx MaxHeapSize := 2092957696
> {product}
> intx ThreadStackSize = 1024
> {pd product}
> intx VMThreadStackSize = 1024
> {pd product}
> java version "1.8.0_201"
> Java(TM) SE Runtime Environment (build 1.8.0_201-b09)
> Java HotSpot(TM) 64-Bit Server VM (build 25.201-b09, mixed mode){code}
> Reporter: Sebastian Wiendl
> Assignee: Julian Feinauer
> Priority: Blocker
>
> After roughly 5-7 days of continued scraper operation (about 10 PLC tags,
> 100ms sampling rate), the scraper stops working with the following log
> output:{code}2019-12-12 18:08:29.569 WARN 23031 --- [nioEventLoopGroup-2-1]
> 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.
> io.netty.util.internal.OutOfDirectMemoryError: failed to allocate 16777216
> byte(s) of direct memory (used: 1845493760, max: 1860698112)
> at
> io.netty.util.internal.PlatformDependent.incrementMemoryCounter(PlatformDependent.java:726)
> ~[netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.util.internal.PlatformDependent.allocateDirectNoCleaner(PlatformDependent.java:681)
> ~[netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.buffer.PoolArena$DirectArena.allocateDirect(PoolArena.java:758)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.buffer.PoolArena$DirectArena.newChunk(PoolArena.java:734)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.buffer.PoolArena.allocateNormal(PoolArena.java:245)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.buffer.PoolArena.allocate(PoolArena.java:215)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.buffer.PoolArena.allocate(PoolArena.java:147)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.buffer.PooledByteBufAllocator.newDirectBuffer(PooledByteBufAllocator.java:342)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:187)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:178)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.buffer.AbstractByteBufAllocator.ioBuffer(AbstractByteBufAllocator.java:139)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.DefaultMaxMessagesRecvByteBufAllocator$MaxMessageHandle.allocate(DefaultMaxMessagesRecvByteBufAllocator.java:114)
> ~[netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:147)
> ~[netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:700)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:635)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:552)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:514)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.util.concurrent.SingleThreadEventExecutor$6.run(SingleThreadEventExecutor.java:1050)
> [netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
> [netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
> [netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at java.lang.Thread.run(Thread.java:748) [na:1.8.0_201]
> 2019-12-12 18:08:29.569 WARN 23031 --- [nioEventLoopGroup-2-1]
> io.netty.channel.DefaultChannelPipeline : An exceptionCaught() event was
> fired, and it reached at the tail of the pipeline. It usually means the last
> handler in the pipeline did not handle the exception.
> io.netty.util.internal.OutOfDirectMemoryError: failed to allocate 16777216
> byte(s) of direct memory (used: 1845493760, max: 1860698112)
> at
> io.netty.util.internal.PlatformDependent.incrementMemoryCounter(PlatformDependent.java:726)
> ~[netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.util.internal.PlatformDependent.allocateDirectNoCleaner(PlatformDependent.java:681)
> ~[netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.buffer.PoolArena$DirectArena.allocateDirect(PoolArena.java:758)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.buffer.PoolArena$DirectArena.newChunk(PoolArena.java:734)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.buffer.PoolArena.allocateNormal(PoolArena.java:245)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.buffer.PoolArena.allocate(PoolArena.java:215)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.buffer.PoolArena.allocate(PoolArena.java:147)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.buffer.PooledByteBufAllocator.newDirectBuffer(PooledByteBufAllocator.java:342)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:187)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:178)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.buffer.AbstractByteBufAllocator.ioBuffer(AbstractByteBufAllocator.java:139)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.DefaultMaxMessagesRecvByteBufAllocator$MaxMessageHandle.allocate(DefaultMaxMessagesRecvByteBufAllocator.java:114)
> ~[netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:147)
> ~[netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:700)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:635)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:552)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:514)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.util.concurrent.SingleThreadEventExecutor$6.run(SingleThreadEventExecutor.java:1050)
> [netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
> [netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
> [netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at java.lang.Thread.run(Thread.java:748) [na:1.8.0_201]
> 2019-12-12 18:08:29.570 WARN 23031 --- [nioEventLoopGroup-2-1]
> io.netty.channel.DefaultChannelPipeline : An exceptionCaught() event was
> fired, and it reached at the tail of the pipeline. It usually means the last
> handler in the pipeline did not handle the exception.
> io.netty.util.internal.OutOfDirectMemoryError: failed to allocate 16777216
> byte(s) of direct memory (used: 1845493760, max: 1860698112)
> at
> io.netty.util.internal.PlatformDependent.incrementMemoryCounter(PlatformDependent.java:726)
> ~[netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.util.internal.PlatformDependent.allocateDirectNoCleaner(PlatformDependent.java:681)
> ~[netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.buffer.PoolArena$DirectArena.allocateDirect(PoolArena.java:758)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.buffer.PoolArena$DirectArena.newChunk(PoolArena.java:734)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.buffer.PoolArena.allocateNormal(PoolArena.java:245)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.buffer.PoolArena.allocate(PoolArena.java:215)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.buffer.PoolArena.allocate(PoolArena.java:147)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.buffer.PooledByteBufAllocator.newDirectBuffer(PooledByteBufAllocator.java:342)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:187)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:178)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.buffer.AbstractByteBufAllocator.ioBuffer(AbstractByteBufAllocator.java:139)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.DefaultMaxMessagesRecvByteBufAllocator$MaxMessageHandle.allocate(DefaultMaxMessagesRecvByteBufAllocator.java:114)
> ~[netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:147)
> ~[netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:700)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:635)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:552)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:514)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.util.concurrent.SingleThreadEventExecutor$6.run(SingleThreadEventExecutor.java:1050)
> [netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
> [netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
> [netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at java.lang.Thread.run(Thread.java:748) [na:1.8.0_201]
> 2019-12-12 18:08:29.570 WARN 23031 --- [nioEventLoopGroup-2-1]
> io.netty.channel.DefaultChannelPipeline : An exceptionCaught() event was
> fired, and it reached at the tail of the pipeline. It usually means the last
> handler in the pipeline did not handle the exception.
> io.netty.util.internal.OutOfDirectMemoryError: failed to allocate 16777216
> byte(s) of direct memory (used: 1845493760, max: 1860698112)
> at
> io.netty.util.internal.PlatformDependent.incrementMemoryCounter(PlatformDependent.java:726)
> ~[netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.util.internal.PlatformDependent.allocateDirectNoCleaner(PlatformDependent.java:681)
> ~[netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.buffer.PoolArena$DirectArena.allocateDirect(PoolArena.java:758)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.buffer.PoolArena$DirectArena.newChunk(PoolArena.java:734)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.buffer.PoolArena.allocateNormal(PoolArena.java:245)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.buffer.PoolArena.allocate(PoolArena.java:215)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.buffer.PoolArena.allocate(PoolArena.java:147)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.buffer.PooledByteBufAllocator.newDirectBuffer(PooledByteBufAllocator.java:342)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:187)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:178)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.buffer.AbstractByteBufAllocator.ioBuffer(AbstractByteBufAllocator.java:139)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.DefaultMaxMessagesRecvByteBufAllocator$MaxMessageHandle.allocate(DefaultMaxMessagesRecvByteBufAllocator.java:114)
> ~[netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:147)
> ~[netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:700)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:635)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:552)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:514)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.util.concurrent.SingleThreadEventExecutor$6.run(SingleThreadEventExecutor.java:1050)
> [netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
> [netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
> [netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at java.lang.Thread.run(Thread.java:748) [na:1.8.0_201]
> 2019-12-12 18:08:29.570 WARN 23031 --- [nioEventLoopGroup-2-1]
> io.netty.channel.DefaultChannelPipeline : An exceptionCaught() event was
> fired, and it reached at the tail of the pipeline. It usually means the last
> handler in the pipeline did not handle the exception.
> io.netty.util.internal.OutOfDirectMemoryError: failed to allocate 16777216
> byte(s) of direct memory (used: 1845493760, max: 1860698112)
> at
> io.netty.util.internal.PlatformDependent.incrementMemoryCounter(PlatformDependent.java:726)
> ~[netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.util.internal.PlatformDependent.allocateDirectNoCleaner(PlatformDependent.java:681)
> ~[netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.buffer.PoolArena$DirectArena.allocateDirect(PoolArena.java:758)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.buffer.PoolArena$DirectArena.newChunk(PoolArena.java:734)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.buffer.PoolArena.allocateNormal(PoolArena.java:245)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.buffer.PoolArena.allocate(PoolArena.java:215)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.buffer.PoolArena.allocate(PoolArena.java:147)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.buffer.PooledByteBufAllocator.newDirectBuffer(PooledByteBufAllocator.java:342)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:187)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.buffer.AbstractByteBufAllocator.buffer(AbstractByteBufAllocator.java:123)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.buffer.AbstractByteBuf.readBytes(AbstractByteBuf.java:886)
> ~[netty-buffer-4.1.43.Final.jar!/:4.1.43.Final]
> at
> org.apache.plc4x.java.isoontcp.protocol.IsoOnTcpProtocol.decode(IsoOnTcpProtocol.java:100)
> ~[plc4j-protocol-iso-on-tcp-0.5.0.jar!/:0.5.0]
> at
> io.netty.handler.codec.ByteToMessageCodec$1.decode(ByteToMessageCodec.java:42)
> ~[netty-codec-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:503)
> ~[netty-codec-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:442)
> ~[netty-codec-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:281)
> ~[netty-codec-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.handler.codec.ByteToMessageCodec.channelRead(ByteToMessageCodec.java:103)
> ~[netty-codec-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:352)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1422)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:931)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:700)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:635)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:552)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:514)
> [netty-transport-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.util.concurrent.SingleThreadEventExecutor$6.run(SingleThreadEventExecutor.java:1050)
> [netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
> [netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at
> io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
> [netty-common-4.1.43.Final.jar!/:4.1.43.Final]
> at java.lang.Thread.run(Thread.java:748) [na:1.8.0_201]
> 2019-12-12 18:08:31.563 WARN 23031 ---
> [triggeredscraper-scheduling-thread-20] o.a.p.j.s.t.TriggeredScraperTask
> : Exception during scraping of Job example, Connection-Alias S7:
> Error-message: null - for stack-trace change logging to DEBUG
> 2019-12-12 18:08:33.564 WARN 23031 ---
> [triggeredscraper-scheduling-thread-20] o.a.p.j.s.t.TriggeredScraperTask
> : Exception during scraping of Job example, Connection-Alias S7:
> Error-message: null - for stack-trace change logging to DEBUG
> 2019-12-12 18:08:35.565 WARN 23031 ---
> [triggeredscraper-scheduling-thread-20] o.a.p.j.s.t.TriggeredScraperTask
> : Exception during scraping of Job example, Connection-Alias S7:
> Error-message: null - for stack-trace change logging to DEBUG
> 2019-12-12 18:08:37.566 WARN 23031 ---
> [triggeredscraper-scheduling-thread-20] o.a.p.j.s.t.TriggeredScraperTask
> : Exception during scraping of Job example, Connection-Alias S7:
> Error-message: null - for stack-trace change logging to DEBUG
> 2019-12-12 18:08:39.566 WARN 23031 ---
> [triggeredscraper-scheduling-thread-20] o.a.p.j.s.t.TriggeredScraperTask
> : Exception during scraping of Job example, Connection-Alias S7:
> Error-message: null - for stack-trace change logging to DEBUG
> 2019-12-12 18:08:41.567 WARN 23031 ---
> [triggeredscraper-scheduling-thread-20] o.a.p.j.s.t.TriggeredScraperTask
> : Exception during scraping of Job example, Connection-Alias S7:
> Error-message: null - for stack-trace change logging to DEBUG
> 2019-12-12 18:08:43.568 WARN 23031 ---
> [triggeredscraper-scheduling-thread-20] o.a.p.j.s.t.TriggeredScraperTask
> : Exception during scraping of Job example, Connection-Alias S7:
> Error-message: null - for stack-trace change logging to DEBUG
> 2019-12-12 18:08:45.568 WARN 23031 ---
> [triggeredscraper-scheduling-thread-20] o.a.p.j.s.t.TriggeredScraperTask
> : Exception during scraping of Job example, Connection-Alias S7:
> Error-message: null - for stack-trace change logging to DEBUG
> 2019-12-12 18:08:47.569 WARN 23031 ---
> [triggeredscraper-scheduling-thread-20] o.a.p.j.s.t.TriggeredScraperTask
> : Exception during scraping of Job example, Connection-Alias S7:
> Error-message: null - for stack-trace change logging to DEBUG
> 2019-12-12 18:08:49.569 WARN 23031 ---
> [triggeredscraper-scheduling-thread-7] o.a.p.j.s.t.TriggeredScraperTask
> : Exception during scraping of Job example, Connection-Alias S7:
> Error-message: null - for stack-trace change logging to DEBUG
> 2019-12-12 18:08:51.570 WARN 23031 ---
> [triggeredscraper-scheduling-thread-7] o.a.p.j.s.t.TriggeredScraperTask
> : Exception during scraping of Job example, Connection-Alias S7:
> Error-message: null - for stack-trace change logging to DEBUG{code}
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