huisunan opened a new issue, #3871:
URL: https://github.com/apache/hertzbeat/issues/3871
### Is there an existing issue for this?
- [x] I have searched the existing issues
### Current Behavior
添加了一个maxwell的prometheus失败，如何查看debug日志，来判断是哪里出现的问题
### Expected Behavior
_No response_
### Steps To Reproduce
_No response_
### Environment
```markdown
HertzBeat version(s):v1.7.3
```
### Debug logs
`
2025-11-27 13:58:32.403 [netty-server-worker-4] WARN
io.netty.channel.DefaultChannelPipeline Line:1101 - 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.lang.RuntimeException: Failed to deserialize multiple VectorSchemaRoots
at
org.apache.hertzbeat.common.util.ArrowUtil.deserializeMultipleRoots(ArrowUtil.java:105)
at
org.apache.hertzbeat.common.util.ArrowUtil.deserializeMetricsData(ArrowUtil.java:124)
at
org.apache.hertzbeat.manager.scheduler.netty.process.CollectOneTimeDataResponseProcessor.handle(CollectOneTimeDataResponseProcessor.java:44)
at
org.apache.hertzbeat.remoting.netty.NettyRemotingAbstract.processRequestMsg(NettyRemotingAbstract.java:74)
at
org.apache.hertzbeat.remoting.netty.NettyRemotingAbstract.processReceiveMsg(NettyRemotingAbstract.java:60)
at
org.apache.hertzbeat.remoting.netty.NettyRemotingServer$NettyServerHandler.channelRead0(NettyRemotingServer.java:195)
at
org.apache.hertzbeat.remoting.netty.NettyRemotingServer$NettyServerHandler.channelRead0(NettyRemotingServer.java:185)
at
io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:99)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
at
io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:289)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
at
io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:107)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
at
io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346)
at
io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:318)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
at
io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346)
at
io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:318)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
at
io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1357)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at
io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:868)
at
io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:799)
at
io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:501)
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:399)
at
io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
at
io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at java.base/java.lang.Thread.run(Thread.java:1583)
Caused by: java.io.IOException: Unexpected end of input. Missing schema.
at
org.apache.arrow.vector.ipc.ArrowStreamReader.readSchema(ArrowStreamReader.java:207)
at
org.apache.arrow.vector.ipc.ArrowReader.initialize(ArrowReader.java:178)
at
org.apache.arrow.vector.ipc.ArrowReader.ensureInitialized(ArrowReader.java:171)
at
org.apache.arrow.vector.ipc.ArrowReader.getVectorSchemaRoot(ArrowReader.java:68)
at
org.apache.hertzbeat.common.util.ArrowUtil.deserializeMultipleRoots(ArrowUtil.java:98)
... 38 common frames omitted
`
### Anything else?
_No response_
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