Mirza Aliev created IGNITE-17036:
------------------------------------
Summary: RaftException: ESTATEMACHINE:null when change replicas
from 3 to 2 for a table
Key: IGNITE-17036
URL: https://issues.apache.org/jira/browse/IGNITE-17036
Project: Ignite
Issue Type: Bug
Reporter: Mirza Aliev
Reproducer on a feature branch :
{code:java}
void testOneRebalance(@WorkDirectory Path workDir, TestInfo testInfo) throws
Exception {
TableDefinition schTbl1 = SchemaBuilders.tableBuilder("PUBLIC",
"tbl1").columns(
SchemaBuilders.column("key", ColumnType.INT64).build(),
SchemaBuilders.column("val",
ColumnType.INT32).asNullable(true).build()
).withPrimaryKey("key").build();
nodes.get(0).tableManager.createTable(
"PUBLIC.tbl1",
tblChanger -> SchemaConfigurationConverter.convert(schTbl1,
tblChanger)
.changeReplicas(1)
.changePartitions(1));
assertEquals(1,
nodes.get(0).clusterCfgMgr.configurationRegistry().getConfiguration(TablesConfiguration.KEY)
.tables().get("PUBLIC.TBL1").replicas().value());
nodes.get(0).tableManager.alterTable("PUBLIC.TBL1", ch ->
ch.changeReplicas(3));
waitPartitionAssignmentsSyncedToExpected(0, 3);
nodes.get(0).tableManager.alterTable("PUBLIC.TBL1", ch ->
ch.changeReplicas(2));
waitPartitionAssignmentsSyncedToExpected(0, 2);
assertEquals(3, getAssignments(0, 0).size());
assertEquals(3, getAssignments(1, 0).size());
assertEquals(3, getAssignments(2, 0).size());
}
{code}
This code hangs with
{noformat}
2022-05-26 12:14:00:871 +0300 [ERROR][Thread-89][MetaStorageServiceImpl]
Unexpected exception
java.util.concurrent.CompletionException: class
org.apache.ignite.raft.jraft.rpc.impl.RaftException: ESTATEMACHINE:null
at
java.base/java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:331)
at
java.base/java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:346)
at
java.base/java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:632)
at
java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:506)
at
java.base/java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:2088)
at
org.apache.ignite.raft.jraft.rpc.impl.RaftGroupServiceImpl$1.accept(RaftGroupServiceImpl.java:617)
at
org.apache.ignite.raft.jraft.rpc.impl.RaftGroupServiceImpl$1.accept(RaftGroupServiceImpl.java:556)
at
java.base/java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:859)
at
java.base/java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:837)
at
java.base/java.util.concurrent.CompletableFuture$Completion.exec(CompletableFuture.java:479)
at
java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
at
java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020)
at
java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656)
at
java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594)
at
java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183)
Caused by: class org.apache.ignite.raft.jraft.rpc.impl.RaftException:
ESTATEMACHINE:null
at
org.apache.ignite.raft.jraft.rpc.impl.RaftGroupServiceImpl$1.accept(RaftGroupServiceImpl.java:618)
... 9 more
{noformat}
Root cause is the bug in {{{}SimpleInMemoryKeyValueStorage{}}}, method
{{SimpleInMemoryKeyValueStorage#doGetValue}} throws NPE when tries to get
revision on the line {{if (lastVal.tombstone())}} because {{Value lastVal =
lastRevVals.get(key)}} is null.
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