HDDS-5865. Made read retry max attempts and interval configurable.

[SaketaChalamchala]

What changes were proposed in this pull request?

Retry policy when reading keys is hardcoded. Made the read retry max attempts and retry interval configurable in client configuration ozone.client.max.read.retries and ozone.client.max.read.retries

What is the link to the Apache JIRA

https://issues.apache.org/jira/browse/HDDS-5865

How was this patch tested?

Existing UT and integration tests should run as is.

[ashishkumar50]

@SaketaChalamchala, Thanks for working on this.

[ashishkumar50]

@SaketaChalamchala Thanks for updating patch, LGTM +1.

[adoroszlai]

@SaketaChalamchala I recommend resetting master branch in your fork from apache/ozone to avoid more and more Merge branch 'apache:master' into master commits in your PRs. This can be done in Github UI (Sync fork drop-down button in https://github.com/SaketaChalamchala/ozone/tree/master, choose Discard ... commits), or via CLI.

[adoroszlai]

Storing this as static seems unsafe.

1. Code is spread in 3 places:

   • this class
   • class that calls setRetryPolicy
   • class that uses the policy

   It is hard to see if any usage may get outdated or null value.

2. Concurrent clients may get unexpected results.

[SaketaChalamchala]

Thanks for the feedback @adoroszlai . Closing this PR and opened another one #6408 with updated changes. Please review those as well.

@SaketaChalamchala I recommend resetting master branch in your fork from apache/ozone to avoid more and more Merge branch 'apache:master' into master commits in your PRs. This can be done in Github UI (Sync fork drop-down button in https://github.com/SaketaChalamchala/ozone/tree/master, choose Discard ... commits), or via CLI.

Also, will do this from next time. Thanks