[HBASE-14737] Clear cachedMaxVersions when HColumnDescriptor#setValue(VERSIONS, value) is called

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.2.0, 1.3.0, 2.0.0
• Hadoop Flags: Reviewed
• Assignee: Pankaj Kumar
• Reporter: James R. Taylor
• Created: 01/Nov/15 20:42
• Updated: 24/Nov/15 11:16
• Resolved: 24/Nov/15 04:29

Description

HColumnDescriptor caches the value of VERSIONS in a cachedMaxVersions member variable. This member variable should be reset or cleared when setValue(HConstants.VERSIONS, value) is called, like this:

  static final bytes[] VERSIONS_BYTES = Bytes.toBytes(HConstants.VERSIONS);
  public HColumnDescriptor setValue(byte[] key, byte[] value) {
    if (Bytes.compare(HConstants.VERSIONS_BYTES, key) == 0) {
        cachedMaxVersions = UNINITIALIZED;
    }
    values.put(new ImmutableBytesWritable(key),
      new ImmutableBytesWritable(value));
    return this;
  }

Otherwise, you continue getting back cachedMaxVersions instead of the updated value.