[Bug] [Entrance]HDFSCacheLogWriter getOutPutStream NPE

[peacewong]

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Linkis Component

linkis-cg-entrance

What happened + What you expected to happen

There is an NPE problem in HDFSCacheLogWriter getOutputStream, and it does not judge whether the fileSystem is Null
HDFSCacheLogWriter getOutputStream存在NPE问题，没有判断fileSystem是否为Null

def getOutputStream: OutputStream = {
    if (null == outputStream) OUT_LOCKER.synchronized {
      if (null == outputStream) {

        outputStream = fileSystem.write(new FsPath(logPath), false)
      }
    }
    outputStream
  }

You should make a short judgment when writeToFile is called, and give a Warn-level log

Relevent platform

all

Reproduction script

no

Anything else

No response

Are you willing to submit a PR?

• Yes I am willing to submit a PR!

[dlimeng]

I want to fix this issue. Please assign to me.

[peacewong]

I want to fix this issue. Please assign to me.

ok