[BugFix] avoid hudi context npe when cache reload in background

[dirtysalt]

Why I'm doing:

I see a lot of warning in fe.out

Sep 11, 2024 7:12:30 PM com.google.common.cache.LocalCache$Segment lambda$loadAsync$0
WARNING: Exception thrown during refresh
java.util.concurrent.ExecutionException: java.lang.NullPointerException
        at com.google.common.util.concurrent.AbstractFuture.getDoneValue(AbstractFuture.java:592)
        at com.google.common.util.concurrent.AbstractFuture.get(AbstractFuture.java:551)
        at com.google.common.util.concurrent.FluentFuture$TrustedFuture.get(FluentFuture.java:91)
        at com.google.common.util.concurrent.Uninterruptibles.getUninterruptibly(Uninterruptibles.java:247)
        at com.google.common.cache.LocalCache$Segment.getAndRecordStats(LocalCache.java:2345)
        at com.google.common.cache.LocalCache$Segment.lambda$loadAsync$0(LocalCache.java:2325)
        at com.google.common.util.concurrent.DirectExecutor.execute(DirectExecutor.java:31)
        at com.google.common.util.concurrent.AbstractFuture.executeListener(AbstractFuture.java:1286)
        at com.google.common.util.concurrent.AbstractFuture.complete(AbstractFuture.java:1055)
        at com.google.common.util.concurrent.AbstractFuture.setException(AbstractFuture.java:807)
        at com.google.common.util.concurrent.AbstractTransformFuture.run(AbstractTransformFuture.java:105)
        at com.google.common.util.concurrent.DirectExecutor.execute(DirectExecutor.java:31)
        at com.google.common.util.concurrent.ExecutionList.executeListener(ExecutionList.java:145)
        at com.google.common.util.concurrent.ExecutionList.execute(ExecutionList.java:134)
        at com.google.common.util.concurrent.ListenableFutureTask.done(ListenableFutureTask.java:113)
        at java.base/java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:381)
        at java.base/java.util.concurrent.FutureTask.setException(FutureTask.java:250)
        at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:269)
        at com.starrocks.connector.ReentrantExecutor.lambda$execute$1(ReentrantExecutor.java:46)
        at com.starrocks.connector.BoundedExecutor.releaseQueue(BoundedExecutor.java:77)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: java.lang.NullPointerException
        at com.starrocks.connector.hudi.HudiRemoteFileIO.createHudiContext(HudiRemoteFileIO.java:61)
        at com.starrocks.connector.hudi.HudiRemoteFileIO.getRemoteFiles(HudiRemoteFileIO.java:99)
        at com.starrocks.connector.CachingRemoteFileIO.loadRemoteFiles(CachingRemoteFileIO.java:93)
        at com.starrocks.connector.CachingRemoteFileIO$1.load(CachingRemoteFileIO.java:54)
        at com.starrocks.connector.CachingRemoteFileIO$1.load(CachingRemoteFileIO.java:51)
        at com.google.common.cache.CacheLoader.reload(CacheLoader.java:100)
        at com.google.common.cache.CacheLoader$1.lambda$reload$0(CacheLoader.java:198)
        at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
        ... 5 more

It's because when cache reload in background, RemotePathKey does not have scan context object, which leads to NPE.

but in most cases, scan context has been set before listing files.

What I'm doing:

Create scan context when it's nullptr.

Fixes #issue

What type of PR is this:

• BugFix
• Feature
• Enhancement
• Refactor
• UT
• Doc
• Tool

Does this PR entail a change in behavior?

• Yes, this PR will result in a change in behavior.
• No, this PR will not result in a change in behavior.

If yes, please specify the type of change:

• Interface/UI changes: syntax, type conversion, expression evaluation, display information
• Parameter changes: default values, similar parameters but with different default values
• Policy changes: use new policy to replace old one, functionality automatically enabled
• Feature removed
• Miscellaneous: upgrade & downgrade compatibility, etc.

Checklist:

• I have added test cases for my bug fix or my new feature
• This pr needs user documentation (for new or modified features or behaviors)
  • I have added documentation for my new feature or new function
• This is a backport pr

Bugfix cherry-pick branch check:

• I have checked the version labels which the pr will be auto-backported to the target branch
  • 3.3
  • 3.2
  • 3.1
  • 3.0
  • 2.5

[sonarcloud]

Quality Gate passed

Issues
4 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[github-actions]

[Java-Extensions Incremental Coverage Report]

✅ pass : 0 / 0 (0%)

[github-actions]

[FE Incremental Coverage Report]

✅ pass : 13 / 16 (81.25%)

file detail

	path	covered_line	new_line	coverage	not_covered_line_detail
🔵	com/starrocks/connector/hudi/HudiRemoteFileIO.java	4	7	57.14%	[74, 91, 97]
🔵	com/starrocks/connector/RemoteFileScanContext.java	5	5	100.00%	[]
🔵	com/starrocks/connector/RemotePathKey.java	4	4	100.00%	[]

[github-actions]

[BE Incremental Coverage Report]

✅ pass : 0 / 0 (0%)

[github-actions]

@Mergifyio backport branch-3.3

[github-actions]

@Mergifyio backport branch-3.2

[mergify]

backport branch-3.3

✅ Backports have been created

• #51145 [BugFix] avoid hudi context npe when cache reload in background (backport #50987) has been created for branch branch-3.3 but encountered conflicts

[mergify]

backport branch-3.2

✅ Backports have been created

• #51146 [BugFix] avoid hudi context npe when cache reload in background (backport #50987) has been created for branch branch-3.2 but encountered conflicts