[jira] [Created] (HADOOP-17334) CosNInputStream should throw exception when filesystem is closed

["steven zhang (Jira)" <ji...@apache.org>]

steven zhang created HADOOP-17334:
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             Summary: CosNInputStream should throw exception when filesystem is closed
                 Key: HADOOP-17334
                 URL: https://issues.apache.org/jira/browse/HADOOP-17334
             Project: Hadoop Common
          Issue Type: Improvement
          Components: fs, fs/cos
    Affects Versions: 3.3.0
            Reporter: steven zhang


Thread hangs when other thread call filesystem.close(). log as below

971  [main] INFO  org.apache.hadoop.fs.cosn.CosNFileSystem  - Open the file: [cosn://bigdata-test

1075 [main] ERROR org.apache.hadoop.util.BlockingThreadPoolExecutorService  - Could not submit task to executor java.util.concurrent.ThreadPoolExecutor

the thread hangs reason is :
 # filesystem is cached when multiple thread using FileSystem#get method for creating instance
 # CosNInputStream#read method is not check CosNFileSystem is closed
 # CosNInputStream is using multiple thread(CosNFileReadTask) for read and main thread will await when readbuffer status is init
 # CosNFileSystem#close method will shutdown boundedIOThreadPool . so CosNInputStream#CosNFileReadTask will not notify main thread and cause thread hangs

so CosNInputStream should throw exception when filesystem is closed

 



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