chengshiwen opened a new issue #4271:
URL: https://github.com/apache/incubator-dolphinscheduler/issues/4271
**For better global communication, Please describe it in English. If you
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**Describe the bug**
A clear and concise description of what the bug is.
**To Reproduce**
Steps to reproduce the behavior, for example:
1. If the path of a log file doesn't exist, IOException or
NoSuchFileException will occur in logger server
```
java.io.UncheckedIOException: java.io.IOException: Is a directory
at java.io.BufferedReader$1.hasNext(BufferedReader.java:574)
at
java.util.Spliterators$IteratorSpliterator.tryAdvance(Spliterators.java:1811)
at
java.util.stream.ReferencePipeline.forEachWithCancel(ReferencePipeline.java:126)
at
java.util.stream.AbstractPipeline.copyIntoWithCancel(AbstractPipeline.java:499)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:486)
at
java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
at
java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
at
org.apache.dolphinscheduler.server.log.LoggerRequestProcessor.readPartFileContent(LoggerRequestProcessor.java:173)
at
org.apache.dolphinscheduler.server.log.LoggerRequestProcessor.process(LoggerRequestProcessor.java:96)
at
org.apache.dolphinscheduler.remote.handler.NettyServerHandler$1.run(NettyServerHandler.java:128)
```
and
```
java.nio.file.NoSuchFileException:
/tmp/dolphinscheduler/exec/process/1/20/22/63.log
at sun.nio.fs.UnixException.translateToIOException(UnixException.java:86)
at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102)
at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107)
at
sun.nio.fs.UnixFileSystemProvider.newByteChannel(UnixFileSystemProvider.java:214)
at java.nio.file.Files.newByteChannel(Files.java:361)
at java.nio.file.Files.newByteChannel(Files.java:407)
at
java.nio.file.spi.FileSystemProvider.newInputStream(FileSystemProvider.java:384)
at java.nio.file.Files.newInputStream(Files.java:152)
at java.nio.file.Files.newBufferedReader(Files.java:2784)
at java.nio.file.Files.lines(Files.java:3744)
at java.nio.file.Files.lines(Files.java:3785)
at
org.apache.dolphinscheduler.server.log.LoggerRequestProcessor.readPartFileContent(LoggerRequestProcessor.java:172)
at
org.apache.dolphinscheduler.server.log.LoggerRequestProcessor.process(LoggerRequestProcessor.java:96)
at
org.apache.dolphinscheduler.remote.handler.NettyServerHandler$1.run(NettyServerHandler.java:128)
```
**Expected behavior**
.IOException or NoSuchFileException fixed.
**Screenshots**
If applicable, add screenshots to help explain your problem.
**Which version of Dolphin Scheduler:**
-The latest dev branch
**Additional context**
Add any other context about the problem here.
**Requirement or improvement**
- Please describe about your requirements or improvement suggestions.
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