Igniters, According to javadoc [1] class ThreadLocal: `ThreadLocal instances are typically private *static* fields in classes that wish to associate state with a thread (e.g., a user ID or Transaction ID).`
So, AFAIK non-static ThreadLocal usage means as `per thread - per class instance`. What the real cases of using non-static ThreadLocal class fields in Ignite code project? When we need it? In Ignite code project I've found ThreadLocal usage as: - non-static - 67 - static - 68 Back to my example, I've checked FileWriteAheadLogManager. It has: 1) private final ThreadLocal<Boolean> interrupted [2] 2) private final ThreadLocal<WALPointer> lastWALPtr [3] I think both of these fields should be set and used as `static`. Can anyone confirm it? [1] https://docs.oracle.com/javase/8/docs/api/java/lang/ThreadLocal.html [2] https://github.com/apache/ignite/blob/master/modules/core/src/main/java/org/apache/ignite/internal/processors/cache/persistence/wal/FileWriteAheadLogManager.java#L253 [3] https://github.com/apache/ignite/blob/master/modules/core/src/main/java/org/apache/ignite/internal/processors/cache/persistence/wal/FileWriteAheadLogManager.java#L340 -- -- Maxim Muzafarov
