[OAK-2364] SegmentMK thin consistency check on startup

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Component/s: segmentmk
• Labels: production resilience
• Epic Link: Improve SegmentMK resilience
• Assignee: Alex Deparvu
• Reporter: Alex Deparvu
• Created: 17/Dec/14 14:01
• Updated: 20/Jan/16 10:37
• Resolved: 20/Jan/16 10:37

Description

Following OAK-2323, I'd like to add a thin consistency check on startup to verify if the current rev is broken by some pending transaction or not.

The current startup check behavior is too lazy and it can miss some broken repos where the super root is only partly persisted.

java.lang.IllegalStateException: String is too long: 4531747125156176000
at org.apache.jackrabbit.oak.plugins.segment.Segment.loadString(Segment.java:344)
at org.apache.jackrabbit.oak.plugins.segment.Segment.readString(Segment.java:311)
at org.apache.jackrabbit.oak.plugins.segment.Segment.readString(Segment.java:305)
at org.apache.jackrabbit.oak.plugins.segment.Segment.loadTemplate(Segment.java:388)
at org.apache.jackrabbit.oak.plugins.segment.Segment.readTemplate(Segment.java:359)
at org.apache.jackrabbit.oak.plugins.segment.Segment.readTemplate(Segment.java:353)
at org.apache.jackrabbit.oak.plugins.segment.SegmentNodeState.getTemplate(SegmentNodeState.java:74)

Issue Links

• relates to: OAK-2323 SegmentMK consistency check