Add allowNative system properties as switch #28
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luhenry
reviewed
Dec 15, 2025
luhenry
approved these changes
Dec 15, 2025
pan3793
commented
Dec 16, 2025
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| final class InstanceBuilder { | ||
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| public static final String ALLOW_NATIVE_ARPACK = "dev.ludovic.netlib.arpack.allowNative"; |
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after second thought, maybe it's better to define it at interface LAPACK instead of here, since it is kind of a public API, @luhenry what do you think?
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kindly ping @luhenry, could you please take another look? |
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kindly ping @luhenry again ... |
luhenry
approved these changes
Jan 27, 2026
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@luhenry, thanks for merging! Could you please trigger a release, so I can use it on Spark? |
Owner
You're absolutely welcome, and thank you for your patience! I'll trigger a release in next few days. |
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This PR proposes to add the following 3 Java system properties as a switch so that the user can control whether
ARPACK.getInstance(),BLAS.getInstance(), andLAPACK.getInstance()prefer to return the native implementation.Sometimes the shared cluster(e.g., Apache Hadoop YARN) host installs very old or bugly OpenBLAS/MKL libs, for Apache Spark jobs, it does not have a switch to disable using that for a single job. With this patch, it's able to pass those system properties so that the user can prefer using the Java implementation without touching the OS libs.