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https://issues.apache.org/jira/browse/HADOOP-17858?focusedWorklogId=640611&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-640611
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ASF GitHub Bot logged work on HADOOP-17858:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 23/Aug/21 08:27
Start Date: 23/Aug/21 08:27
Worklog Time Spent: 10m
Work Description: virajjasani opened a new pull request #3321:
URL: https://github.com/apache/hadoop/pull/3321
### Description of PR
Superclass Verifier has a static initializer VERIFIER_NONE that initializes
sub-class VerifierNone. This reference can result in deadlock during class
loading as per
https://docs.oracle.com/javase/specs/jls/se8/html/jls-12.html#jls-12.4.2.
As of today, only RpcProgram use this instance and hence it is safe but if
more clients start using this (specifically static ones), it has potential to
bring deadlock. We should break this referencing before it is late.
### How was this patch tested?
TestRPC* unit tests
### For code changes:
- [X] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
- [ ] Object storage: have the integration tests been executed and the
endpoint declared according to the connector-specific documentation?
- [ ] If adding new dependencies to the code, are these dependencies
licensed in a way that is compatible for inclusion under [ASF
2.0](http://www.apache.org/legal/resolved.html#category-a)?
- [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`,
`NOTICE-binary` files?
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Issue Time Tracking
-------------------
Worklog Id: (was: 640611)
Remaining Estimate: 0h
Time Spent: 10m
> Avoid possible class loading deadlock with VerifierNone initialization
> ----------------------------------------------------------------------
>
> Key: HADOOP-17858
> URL: https://issues.apache.org/jira/browse/HADOOP-17858
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Viraj Jasani
> Assignee: Viraj Jasani
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Superclass Verifier has a static initializer VERIFIER_NONE that initializes
> sub-class VerifierNone. This reference can result in deadlock during class
> loading as per
> [https://docs.oracle.com/javase/specs/jls/se8/html/jls-12.html#jls-12.4.2].
> As of today, only RpcProgram use this instance and hence it is safe but if
> more clients start using this (specifically static ones), it has potential to
> bring deadlock. We should break this referencing before it is late.
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