Patrick Lee created CASSANDRA-21426:
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Summary: Auto-repair AssertionError in hasReplicaWithOngoingRepair
when parallel_repair_count > 1 or more precisely:
Key: CASSANDRA-21426
URL: https://issues.apache.org/jira/browse/CASSANDRA-21426
Project: Apache Cassandra
Issue Type: Bug
Reporter: Patrick Lee
testing out auto-repair in 5.0.8, i came across an assertion error when more
than 1 node is configured to be able to run
{code:java}
ERROR [AutoRepair-Repair-incremental:1] 2026-06-03T05:04:18,206
JVMStabilityInspector.java:70 - Exception in thread
Thread[AutoRepair-Repair-incremental:1,5,AutoRepair-Repair-incremental]
java.lang.AssertionError: null
at
org.apache.cassandra.locator.TokenMetadata.getTopology(TokenMetadata.java:1392)
at
org.apache.cassandra.locator.NetworkTopologyStrategy.calculateNaturalReplicas(NetworkTopologyStrategy.java:190)
at
org.apache.cassandra.locator.AbstractReplicationStrategy.getRangeAddresses(AbstractReplicationStrategy.java:265)
at
org.apache.cassandra.repair.autorepair.AutoRepairUtils.hasReplicaWithOngoingRepair(AutoRepairUtils.java:738)
at
org.apache.cassandra.repair.autorepair.AutoRepairUtils.lambda$getMostEligibleHostToRepair$5(AutoRepairUtils.java:697)
at
java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:178)
at
java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179)
at
java.base/java.util.stream.SortedOps$SizedRefSortingSink.end(SortedOps.java:361)
at
java.base/java.util.stream.AbstractPipeline.copyIntoWithCancel(AbstractPipeline.java:528)
at
java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:513)
at
java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
at
java.base/java.util.stream.FindOps$FindOp.evaluateSequential(FindOps.java:150)
at
java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at
java.base/java.util.stream.ReferencePipeline.findFirst(ReferencePipeline.java:647)
at
org.apache.cassandra.repair.autorepair.AutoRepairUtils.getMostEligibleHostToRepair(AutoRepairUtils.java:706)
at
org.apache.cassandra.repair.autorepair.AutoRepairUtils.myTurnToRunRepair(AutoRepairUtils.java:956)
at
org.apache.cassandra.repair.autorepair.AutoRepair.repair(AutoRepair.java:204)
at
org.apache.cassandra.repair.autorepair.AutoRepair.lambda$setup$0(AutoRepair.java:143)
at
org.apache.cassandra.concurrent.ExecutionFailure$1.run(ExecutionFailure.java:133)
at
java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
at
java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
at
java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.base/java.lang.Thread.run(Thread.java:840) {code}
while running with the parallel_repair_count: 1 everything was fine but then i
changed this to 3 and started seeing these assertion errors. repairs still
ran, it was just only 1 node allowed at a time.
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