[HADOOP-8611] Allow fall-back to the shell-based implementation when JNI-based users-group mapping fails

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0.3, 0.23.0, 2.0.0-alpha
• Fix Version/s: 1.2.0, 0.23.3, 2.0.2-alpha
• Component/s: security
• Target Version/s: 0.23.3
• Assignee: Robert Parker
• Reporter: Kihwal Lee
• Created: 20/Jul/12 13:41
• Updated: 06/May/13 03:30
• Resolved: 20/Aug/12 21:22

Description

When the JNI-based users-group mapping is enabled, the process/command will fail if the native library, libhadoop.so, cannot be found. This mostly happens at client-side where users may use hadoop programatically. Instead of failing, falling back to the shell-based implementation will be desirable. Depending on how cluster is configured, use of the native netgroup mapping cannot be subsituted by the shell-based default. For this reason, this behavior must be configurable with the default being "disabled".