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https://issues.apache.org/jira/browse/HADOOP-17999?focusedWorklogId=679371&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-679371
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ASF GitHub Bot logged work on HADOOP-17999:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 09/Nov/21 23:42
Start Date: 09/Nov/21 23:42
Worklog Time Spent: 10m
Work Description: abhishekdas99 opened a new pull request #3639:
URL: https://github.com/apache/hadoop/pull/3639
JIRA: https://issues.apache.org/jira/browse/HADOOP-17999
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### Description of PR
All the target filesystems corresponding to mount points are initialized in
setWriteChecksum and setVerifyChecksum methods. This PR initializes the
filesystems lazily
### How was this patch tested?
Added unit tests. Also for large number of mount points, hadoop cli commands
such as get, put or copyFromLocal were throwing OOM. With the fix, the commands
were successful.
### For code changes:
- [ ] 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: 679371)
Remaining Estimate: 0h
Time Spent: 10m
> ViewFileSystem.setVerifyChecksum should not initialize all target filesystems
> -----------------------------------------------------------------------------
>
> Key: HADOOP-17999
> URL: https://issues.apache.org/jira/browse/HADOOP-17999
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Abhishek Das
> Assignee: Abhishek Das
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Currently setVerifyChecksum and setWriteChecksum initializes all target file
> systems which causes delay in hadoop shell copy commands such as get, put,
> copyFromLocal etc.
> This also eventually causes OOM.
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