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https://issues.apache.org/jira/browse/HADOOP-17675?focusedWorklogId=592658&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-592658
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ASF GitHub Bot logged work on HADOOP-17675:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 04/May/21 10:34
Start Date: 04/May/21 10:34
Worklog Time Spent: 10m
Work Description: sodonnel merged pull request #2965:
URL: https://github.com/apache/hadoop/pull/2965
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Issue Time Tracking
-------------------
Worklog Id: (was: 592658)
Time Spent: 40m (was: 0.5h)
> LdapGroupsMapping$LdapSslSocketFactory ClassNotFoundException
> -------------------------------------------------------------
>
> Key: HADOOP-17675
> URL: https://issues.apache.org/jira/browse/HADOOP-17675
> Project: Hadoop Common
> Issue Type: Improvement
> Components: common
> Affects Versions: 3.2.2
> Reporter: Tamas Mate
> Assignee: István Fajth
> Priority: Major
> Labels: pull-request-available
> Attachments: stacktrace.txt
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> Using LdapGroupsMapping with SSL enabled causes ClassNotFoundException when
> it is called through native threads, such as Apache Impala does.
> When a thread is attached to the VM, the currentThread's context classloader
> is null, so when jndi internally tries to use the current thread's context
> classloader to load the socket factory implementation, the
> Class.forname(String, boolean, ClassLoader) method gets a null as the loaderÂ
> uses the bootstrap classloader.
> Meanwhile the LdapGroupsMapping class and the SslSocketFactory defined in it
> is loaded by the application classloader from its classpath.
> As the bootstrap classloader does not have hadoop-common in its classpath,
> when a native thread tries to use/load the LdapGroupsMapping class it can't
> because the bootstrap loader can't load anything from hadoop-common. The
> correct solution seems to be to set the currentThread's context classloader
> to the classloader of LdapGroupsMapping class before initializing the jndi
> internals, and then reset to the original value after, with that we can
> ensure that the behaviour of other things does not change, but this failure
> can be avoided as well.
> Attached the complete stacktrace to this Jira.
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