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https://issues.apache.org/jira/browse/HADOOP-18807?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17744031#comment-17744031
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ASF GitHub Bot commented on HADOOP-18807:
-----------------------------------------
zhangshuyan0 commented on code in PR #5847:
URL: https://github.com/apache/hadoop/pull/5847#discussion_r1266100987
##########
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/fs/viewfs/TestViewFileSystemClose.java:
##########
@@ -0,0 +1,64 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.hadoop.fs.viewfs;
Review Comment:
Sorry I don't fully understand what you mean. Do you suggest moving this
test file to hadoop-common?
> Close child file systems in ViewFileSystem when cache is disabled.
> ------------------------------------------------------------------
>
> Key: HADOOP-18807
> URL: https://issues.apache.org/jira/browse/HADOOP-18807
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Shuyan Zhang
> Priority: Major
> Labels: pull-request-available
>
> When the cache is configured to disabled (namely,
> `fs.viewfs.enable.inner.cache=false` and `fs.*.impl.disable.cache=true`),
> even if `FileSystem.close()` is called, the client cannot truly close the
> child file systems in a ViewFileSystem. This caused our long-running clients
> to constantly produce resource leaks.
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