[HADOOP-13684] Snappy may complain Hadoop is built without snappy if libhadoop is not found.

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.8.0, 3.0.0-alpha2
• Labels: supportability
• Assignee: Wei-Chiu Chuang
• Reporter: Wei-Chiu Chuang
• Created: 04/Oct/16 20:53
• Updated: 02/Oct/19 17:15
• Resolved: 11/Oct/16 20:26

Description

If for some reason libhadoop can not be found/loaded, Snappy complains Hadoop is not built with Snappy but it actually is.

SnappyCodec.java

public static void checkNativeCodeLoaded() {
      if (!NativeCodeLoader.isNativeCodeLoaded() ||
          !NativeCodeLoader.buildSupportsSnappy()) {
        throw new RuntimeException("native snappy library not available: " +
            "this version of libhadoop was built without " +
            "snappy support.");
      }

This case may happen with MAPREDUCE-6577.

Issue Links

• is related to: HADOOP-14981 SnappyCodec.checkNativeCodeLoaded raises UnsatisfiedLinkError if native code is missing
• relates to: MAPREDUCE-6577 MR AM unable to load native library without MR_AM_ADMIN_USER_ENV set