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https://issues.apache.org/jira/browse/HDFS-15052?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17041489#comment-17041489
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Hudson commented on HDFS-15052:
-------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #17971 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/17971/])
HDFS-15052. WebHDFS getTrashRoot leads to OOM due to FileSystem object (github:
rev 2338d25dc7150d75fbda84cc95422380b5622224)
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/web/TestWebHDFS.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DistributedFileSystem.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSUtilClient.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/web/resources/NamenodeWebHdfsMethods.java
> WebHDFS getTrashRoot leads to OOM due to FileSystem object creation
> -------------------------------------------------------------------
>
> Key: HDFS-15052
> URL: https://issues.apache.org/jira/browse/HDFS-15052
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: webhdfs
> Affects Versions: 2.9.0, 3.0.0-alpha2
> Reporter: Wei-Chiu Chuang
> Assignee: Masatake Iwasaki
> Priority: Major
>
> Quoting [~daryn] in HDFS-10756 :
> {quote}Surprised nobody has discovered this will lead to an inevitable OOM in
> the NN. The NN should not be creating filesystems to itself, and must never
> create filesystems in a remote user's context or the cache will explode.
> {quote}
> I guess the problem lies in side NamenodeWebHdfsMethods#getTrashRoot
> {code:java}
> private static String getTrashRoot(String fullPath,
> Configuration conf) throws IOException {
> FileSystem fs = FileSystem.get(conf != null ? conf : new
> Configuration());
> return fs.getTrashRoot(
> new org.apache.hadoop.fs.Path(fullPath)).toUri().getPath();
> }
> {code}
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