CalvinKirs opened a new pull request, #45956:
URL: https://github.com/apache/doris/pull/45956
### Background
When using an HMS-based Iceberg Catalog, refreshing the Catalog frequently
creates new HadoopAuthenticator instances. This leads to the following issues:
#### Frequent FileSystem Creation:
Iceberg uses Path.getFileSystem(Configuration) to obtain a FileSystem
instance. Even though the Configuration remains unchanged, changes in the
UserGroupInformation (UGI) cause new FileSystem instances to be created.
#### Resource Leakage:
```
Newly created FileSystem instances are not released, leading to increased
resource consumption over time.
198: 1978 72712 [Ljava.security.Principal;
244: 2202 52848
javax.security.auth.kerberos.KerberosPrincipal
418: 753 24096 sun.security.krb5.PrincipalName
717: 391 9384
com.sun.security.auth.UnixNumericGroupPrincipal
940: 382 6112
com.sun.security.auth.UnixNumericUserPrincipal
```
#### Root Cause
Each Catalog refresh creates a new HadoopAuthenticator instance. Changes in
the UGI contained in HadoopAuthenticator lead to the creation of new FileSystem
instances, even when the Configuration is the same.
Related PR: #xxx
Problem Summary:
### Release note
None
### Check List (For Author)
- Test <!-- At least one of them must be included. -->
- [ ] Regression test
- [ ] Unit Test
- [ ] Manual test (add detailed scripts or steps below)
- [ ] No need to test or manual test. Explain why:
- [ ] This is a refactor/code format and no logic has been changed.
- [ ] Previous test can cover this change.
- [ ] No code files have been changed.
- [ ] Other reason <!-- Add your reason? -->
- Behavior changed:
- [ ] No.
- [ ] Yes. <!-- Explain the behavior change -->
- Does this need documentation?
- [ ] No.
- [ ] Yes. <!-- Add document PR link here. eg:
https://github.com/apache/doris-website/pull/1214 -->
### Check List (For Reviewer who merge this PR)
- [ ] Confirm the release note
- [ ] Confirm test cases
- [ ] Confirm document
- [ ] Add branch pick label <!-- Add branch pick label that this PR should
merge into -->
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