[HDFS-12987] Document - Disabling the Lazy persist file scrubber.

• Type: Bug
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Fix Version/s: 3.1.0
• Component/s: documentation, hdfs
• Labels: documentation
• Hadoop Flags: Reviewed
• Flags: Patch
• Assignee: Karthik Palanisamy
• Reporter: Karthik Palanisamy
• Created: 04/Jan/18 09:52
• Updated: 04/Jan/18 18:55
• Resolved: 04/Jan/18 18:32

Description

LazyPersistFileScrubber will be disabled if scrubber interval configured to zero. But the document was incorrect - "Set it to a negative value to disable this behavior".

Namenode will not start if we set to negative value. We have another strong check to prevent it.

   if (this.lazyPersistFileScrubIntervalSec < 0) {
        throw new IllegalArgumentException(
            DFS_NAMENODE_LAZY_PERSIST_FILE_SCRUB_INTERVAL_SEC
                + " must be zero (for disable) or greater than zero.");
      }

This seems reflected due to HDFS-8276