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List:       hadoop-dev
Subject:    [jira] [Created] (HADOOP-17334) CosNInputStream should throw exception when filesystem is closed
From:       "steven zhang (Jira)" <jira () apache ! org>
Date:       2020-10-28 6:38:00
Message-ID: JIRA.13337583.1603867036000.103559.1603867080061 () Atlassian ! JIRA
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steven zhang created HADOOP-17334:
-------------------------------------

             Summary: CosNInputStream should throw exception when filesyste=
m 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=C2=A0 [main] INFO=C2=A0 org.apache.hadoop.fs.cosn.CosNFileSystem=C2=A0 =
- Open the file: [cosn://bigdata-test

1075 [main] ERROR org.apache.hadoop.util.BlockingThreadPoolExecutorService=
=C2=A0 - Could not submit task to executor java.util.concurrent.ThreadPoolE=
xecutor

the thread hangs reason is :
 # filesystem is cached when multiple thread using=C2=A0FileSystem#get meth=
od for creating instance
 # CosNInputStream#read method is not check=C2=A0CosNFileSystem is closed
 # CosNInputStream is using multiple thread(CosNFileReadTask) for read and =
main thread will=C2=A0await when readbuffer status is init
 # CosNFileSystem#close method will shutdown boundedIOThreadPool . so=C2=A0=
CosNInputStream#CosNFileReadTask will not notify=C2=A0main thread and cause=
=C2=A0thread hangs

so CosNInputStream should throw exception when filesystem is closed

=C2=A0



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