[CASSANDRA-11962] Non-fatal NPE during concurrent repair check

• Type: Bug
• Status: Resolved
• Priority: Low
• Resolution: Duplicate
• Severity: Low
• Assignee: Unassigned
• Reporter: Robert Stupp
• Created: 06/Jun/16 08:21
• Updated: 16/Apr/19 09:30
• Resolved: 23/Jun/16 12:36

Description

"Usual" checks for multiple repairs result in this exception in the log file:

ERROR [ValidationExecutor:6] 2016-06-06 07:56:23,530 CassandraDaemon.java:222 - Exception in thread Thread[ValidationExecutor:6,1,main]
java.lang.RuntimeException: Cannot start multiple repair sessions over the same sstables
        at org.apache.cassandra.db.compaction.CompactionManager.getSSTablesToValidate(CompactionManager.java:1325) ~[main/:na]
        at org.apache.cassandra.db.compaction.CompactionManager.doValidationCompaction(CompactionManager.java:1215) ~[main/:na]
        at org.apache.cassandra.db.compaction.CompactionManager.access$700(CompactionManager.java:81) ~[main/:na]
        at org.apache.cassandra.db.compaction.CompactionManager$11.call(CompactionManager.java:844) ~[main/:na]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_91]

However, I saw this one:

ERROR [ValidationExecutor:6] 2016-06-06 07:56:25,002 CassandraDaemon.java:222 - Exception in thread Thread[ValidationExecutor:6,1,main]
java.lang.NullPointerException: null
        at org.apache.cassandra.service.ActiveRepairService$ParentRepairSession.getActiveSSTables(ActiveRepairService.java:495) ~[main/:na]
        at org.apache.cassandra.service.ActiveRepairService$ParentRepairSession.access$300(ActiveRepairService.java:451) ~[main/:na]
        at org.apache.cassandra.service.ActiveRepairService.currentlyRepairing(ActiveRepairService.java:338) ~[main/:na]
        at org.apache.cassandra.db.compaction.CompactionManager.getSSTablesToValidate(CompactionManager.java:1320) ~[main/:na]
        at org.apache.cassandra.db.compaction.CompactionManager.doValidationCompaction(CompactionManager.java:1215) ~[main/:na]
        at org.apache.cassandra.db.compaction.CompactionManager.access$700(CompactionManager.java:81) ~[main/:na]
        at org.apache.cassandra.db.compaction.CompactionManager$11.call(CompactionManager.java:844) ~[main/:na]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_91]

Looks like there is no entry for cfId in getActiveSStables at for (SSTableReader sstable : columnFamilyStores.get(cfId).getSSTables()).

(against trunk)

Issue Links

• duplicates: CASSANDRA-12077 NPE when trying to get sstables for anticompaction