ARROW-16566: [Java] Initialize JNI components on use instead of statically #119
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Merged from apache/arrow.
We are using Arrow in Spark. When speculation is turned on, it is possible for the task to be forcibly killed during the running process. It means,
JniLoader.get().ensureLoaded()maybe failed withClosedByInterruptExceptionwhen the task was killed, and it should be accepted with this.However,
NativeMemoryPooluse it as a static code, this leads to an init failure every time the NativeMemroyPool is trying to initialized and can never succeed. It would always fail to initNativeMemoryPoolwithjava.lang.NoClassDefFoundError: Could not initialize class org.apache.arrow.dataset.jni.NativeMemoryPool.