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[jvm-packages] handle null to avoid potential NullPointerException #10499

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ShangjinTang
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This PR add null checks for jvm-packages/xgboost4j/src/main/java/ml/dmlc/xgboost4j/java/TrackerProperties.java.

It retrieves the current thread's class loader using Thread.currentThread().getContextClassLoader() and verifies if it is not null.

@trivialfis
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Hi, thank you for the PR. Could you please elaborate on under what circumstances it would be null, and what happens if it's null after this PR?

@ShangjinTang
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Hello,

This is a failure that we scanned from our static code check tool and marked as "must be fixed".
I also searched from web, some developers have occured that Thread.currentThread().getContextClassLoader() might be null (although I cannot reproduce the issue).
I am using the xgboost4j library on Android, so the entire process would crash if contextClassLoader is null.

Thanks

@wbo4958
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wbo4958 commented Jul 5, 2024

Looks like TrackerProperties.java is not used anymore after tracker reworking.

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3 participants