Packages

c

org.apache.hive.service.server

ThreadFactoryWithGarbageCleanup

class ThreadFactoryWithGarbageCleanup extends ThreadFactory

A ThreadFactory for constructing new HiveServer2 threads that lets you plug in custom cleanup code to be called before this thread is GC-ed. Currently cleans up the following: 1. ThreadLocal RawStore object: In case of an embedded metastore, HiveServer2 threads (foreground and background) end up caching a ThreadLocal RawStore object. The ThreadLocal RawStore object has an instance of PersistenceManagerFactory and PersistenceManager. The PersistenceManagerFactory keeps a cache of PersistenceManager objects, which are only removed when PersistenceManager#close method is called. HiveServer2 uses ExecutorService for managing thread pools for foreground and background threads. ExecutorService unfortunately does not provide any hooks to be called, when a thread from the pool is terminated. As a solution, we're using this ThreadFactory to keep a cache of RawStore objects per thread. And we are doing clean shutdown in the finalizer for each thread.

Linear Supertypes
ThreadFactory, AnyRef, Any
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Instance Constructors

  1. new ThreadFactoryWithGarbageCleanup(threadPoolName: String)

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  6. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  7. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  8. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  9. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  10. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  11. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  12. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  13. def newThread(runnable: Runnable): Thread
    Definition Classes
    ThreadFactoryWithGarbageCleanup → ThreadFactory
    Annotations
    @Override()
  14. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  15. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  16. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  17. def toString(): String
    Definition Classes
    AnyRef → Any
  18. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  19. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  20. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()

Inherited from ThreadFactory

Inherited from AnyRef

Inherited from Any

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