[KYLIN-4030] ResourceStore deleteResource by comparing timestamp may be failed to delete caused by time precision loose

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: v2.6.3
• Assignee: PENG Zhengshuai
• Reporter: PENG Zhengshuai
• Created: 03/Jun/19 12:19
• Updated: 05/Jul/19 13:59
• Resolved: 01/Jul/19 01:18

Description

In ResourceStore, the interface deleteResourceImpl(String resPath, long timestamp) maybe failed to delete the resource because the resource timestamp may lose the precision.

For example, if we use $KYLIN_HOME/bin/metastore.sh to backup from metastore to Local OS filesystem, and restore from local filesystem to metastore. The resource timestamp will lose precision in Millis Second.

An example here:
original timestamp: 1559564381
after precision lost: 1559564000

The fix design is to tolerate [0-999] ms difference when comparing the timestamp

Issue Links

• links to: GitHub Pull Request #673