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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-12258) Need translate java.nio.file.NoSuchFileException to FileNotFoundException to avoid regression
Date Thu, 13 Aug 2015 12:07:48 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-12258?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14695129#comment-14695129
] 

Hudson commented on HADOOP-12258:
---------------------------------

FAILURE: Integrated in Hadoop-Yarn-trunk #1016 (See [https://builds.apache.org/job/Hadoop-Yarn-trunk/1016/])
HADOOP-12258. Need translate java.nio.file.NoSuchFileException to FileNotFoundException to
avoid regression. Contributed by Zhihai Xu. (cnauroth: rev 6cc8e38db5b26bdd02bc6bc1c9684db2593eec25)
* hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/contract/AbstractContractGetFileStatusTest.java
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/fs/contract/hdfs/TestHDFSContractSetTimes.java
* hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/contract/AbstractContractSetTimesTest.java
* hadoop-common-project/hadoop-common/src/test/resources/contract/rawlocal.xml
* hadoop-common-project/hadoop-common/CHANGES.txt
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/fs/contract/hdfs/TestHDFSContractGetFileStatus.java
* hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/contract/ContractOptions.java
* hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/RawLocalFileSystem.java
* hadoop-common-project/hadoop-common/src/test/resources/contract/localfs.xml
* hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/contract/rawlocal/TestRawlocalContractSetTimes.java
* hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/contract/localfs/TestLocalFSContractGetFileStatus.java
* hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/contract/localfs/TestLocalFSContractSetTimes.java
* hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/contract/rawlocal/TestRawlocalContractGetFileStatus.java
* hadoop-hdfs-project/hadoop-hdfs/src/test/resources/contract/hdfs.xml


> Need translate java.nio.file.NoSuchFileException to FileNotFoundException to avoid regression
> ---------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-12258
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12258
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs
>            Reporter: zhihai xu
>            Assignee: zhihai xu
>            Priority: Critical
>             Fix For: 2.8.0
>
>         Attachments: HADOOP-12258.000.patch, HADOOP-12258.001.patch, HADOOP-12258.002.patch
>
>
> need translate java.nio.file.NoSuchFileException to FileNotFoundException to avoid regression.
> HADOOP-12045 adds nio to support access time, but nio will create java.nio.file.NoSuchFileException
instead of FileNotFoundException.
> many hadoop codes depend on FileNotFoundException to decide whether a file exists. for
example {{FileContext.util().exists()}}. 
> {code}
>     public boolean exists(final Path f) throws AccessControlException,
>       UnsupportedFileSystemException, IOException {
>       try {
>         FileStatus fs = FileContext.this.getFileStatus(f);
>         assert fs != null;
>         return true;
>       } catch (FileNotFoundException e) {
>         return false;
>       }
>     }
> {code}
> same for {{FileSystem#exists}}
> {code}
>   public boolean exists(Path f) throws IOException {
>     try {
>       return getFileStatus(f) != null;
>     } catch (FileNotFoundException e) {
>       return false;
>     }
>   }
> {code}
> NoSuchFileException will break these functions.
> Since {{exists}} is one of the most used API in FileSystem, this issue is very critical.
> Several test failures for TestDeletionService are caused by this issue:
> https://builds.apache.org/job/PreCommit-YARN-Build/8630/testReport/org.apache.hadoop.yarn.server.nodemanager/TestDeletionService/testRelativeDelete/
> https://builds.apache.org/job/PreCommit-YARN-Build/8632/testReport/org.apache.hadoop.yarn.server.nodemanager/TestDeletionService/testAbsDelete/



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