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https://issues.apache.org/jira/browse/YARN-11823?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17966754#comment-17966754
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ASF GitHub Bot commented on YARN-11823:
---------------------------------------

Hean-Chhinling commented on code in PR #7726:
URL: https://github.com/apache/hadoop/pull/7726#discussion_r2143523528


##########
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/resources/diagnostics/jstack_collector.py:
##########
@@ -0,0 +1,95 @@
+# 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.
+
+import subprocess
+import sys
+
+NUMBER_OF_JSTACK = 3
+
+def get_nodemanager_pid():

Review Comment:
   hmmmm....why is that? The script will only get java processes of the active 
container and execute JStack command on it, not that user could modify the 
script or do some malicious activities?





> New JStack endpoint for running containers and nodes
> ----------------------------------------------------
>
>                 Key: YARN-11823
>                 URL: https://issues.apache.org/jira/browse/YARN-11823
>             Project: Hadoop YARN
>          Issue Type: New Feature
>          Components: yarn
>            Reporter: chhinlinghean
>            Assignee: chhinlinghean
>            Priority: Major
>              Labels: pull-request-available
>
> Getting jstack for container is not trivial to most people. This new endpoint 
> aims to streamline the process of getting jstack of running containers and 
> nodes. It mainly use in the DiagnosticCollector script.



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