[HADOOP-10826] Iteration on KeyProviderFactory.serviceLoader is thread-unsafe

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.6.0
• Component/s: security
• Hadoop Flags: Reviewed
• Assignee: Benoy Antony
• Reporter: Benoy Antony
• Created: 15/Jul/14 10:33
• Updated: 01/Dec/14 03:08
• Resolved: 22/Jul/14 15:44

Description

KeyProviderFactory uses ServiceLoader framework to load KeyProviderFactory

  private static final ServiceLoader<KeyProviderFactory> serviceLoader =
      ServiceLoader.load(KeyProviderFactory.class);

The ServiceLoader framework does lazy initialization of services which makes it thread unsafe. If accessed from multiple threads, it is better to synchronize the access.
Similar synchronization has been done while loading compression codec providers via HADOOP-8406.

Issue Links

• relates to: HADOOP-10829 Iteration on CredentialProviderFactory.serviceLoader is thread-unsafe