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https://issues.apache.org/jira/browse/CASSANDRA-8884?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14345093#comment-14345093
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Benjamin Lerer commented on CASSANDRA-8884:
-------------------------------------------
I am not able to reproduce that problem. My code use CQLSSTableBuilder without
calling first {{Keyspace.open("system")}} and do not trigger any deadlock.
It would help to have a simple program that I can use to reproduce the problem.
> Opening a non-system keyspace before first accessing the system keyspace
> results in deadlock
> --------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-8884
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8884
> Project: Cassandra
> Issue Type: Bug
> Reporter: Piotr Kołaczkowski
> Assignee: Benjamin Lerer
> Attachments: bulk.jstack
>
>
> I created a writer like this:
> {code}
> val writer = CQLSSTableWriter.builder()
> .forTable(tableDef.cql)
> .using(insertStatement)
> .withPartitioner(partitioner)
> .inDirectory(outputDirectory)
> .withBufferSizeInMB(bufferSizeInMB)
> .build()
> {code}
> Then I'm trying to write a row with {{addRow}} and it blocks forever.
> Everything related to {{CQLSSTableWriter}}, including its creation, is
> happening in only one thread.
> {noformat}
> "SSTableBatchOpen:3" daemon prio=10 tid=0x00007f4b399d7000 nid=0x4778 waiting
> for monitor entry [0x00007f4b240a7000]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.cassandra.db.Keyspace.open(Keyspace.java:118)
> - waiting to lock <0x00000000e35fd6d0> (a java.lang.Class for
> org.apache.cassandra.db.Keyspace)
> at org.apache.cassandra.db.Keyspace.open(Keyspace.java:99)
> at
> org.apache.cassandra.cql3.statements.SelectStatement$RawStatement.prepare(SelectStatement.java:1464)
> at
> org.apache.cassandra.cql3.QueryProcessor.getStatement(QueryProcessor.java:517)
> at
> org.apache.cassandra.cql3.QueryProcessor.parseStatement(QueryProcessor.java:265)
> at
> org.apache.cassandra.cql3.QueryProcessor.prepareInternal(QueryProcessor.java:306)
> at
> org.apache.cassandra.cql3.QueryProcessor.executeInternal(QueryProcessor.java:316)
> at
> org.apache.cassandra.db.SystemKeyspace.getSSTableReadMeter(SystemKeyspace.java:910)
> at
> org.apache.cassandra.io.sstable.SSTableReader.<init>(SSTableReader.java:561)
> at
> org.apache.cassandra.io.sstable.SSTableReader.open(SSTableReader.java:433)
> at
> org.apache.cassandra.io.sstable.SSTableReader.open(SSTableReader.java:343)
> at
> org.apache.cassandra.io.sstable.SSTableReader$4.run(SSTableReader.java:480)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
> at java.util.concurrent.FutureTask.run(FutureTask.java:262)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:745)
> "SSTableBatchOpen:2" daemon prio=10 tid=0x00007f4b399e7800 nid=0x4777 waiting
> for monitor entry [0x00007f4b23ca3000]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.cassandra.db.Keyspace.open(Keyspace.java:118)
> - waiting to lock <0x00000000e35fd6d0> (a java.lang.Class for
> org.apache.cassandra.db.Keyspace)
> at org.apache.cassandra.db.Keyspace.open(Keyspace.java:99)
> at
> org.apache.cassandra.cql3.statements.SelectStatement$RawStatement.prepare(SelectStatement.java:1464)
> at
> org.apache.cassandra.cql3.QueryProcessor.getStatement(QueryProcessor.java:517)
> at
> org.apache.cassandra.cql3.QueryProcessor.parseStatement(QueryProcessor.java:265)
> at
> org.apache.cassandra.cql3.QueryProcessor.prepareInternal(QueryProcessor.java:306)
> at
> org.apache.cassandra.cql3.QueryProcessor.executeInternal(QueryProcessor.java:316)
> at
> org.apache.cassandra.db.SystemKeyspace.getSSTableReadMeter(SystemKeyspace.java:910)
> at
> org.apache.cassandra.io.sstable.SSTableReader.<init>(SSTableReader.java:561)
> at
> org.apache.cassandra.io.sstable.SSTableReader.open(SSTableReader.java:433)
> at
> org.apache.cassandra.io.sstable.SSTableReader.open(SSTableReader.java:343)
> at
> org.apache.cassandra.io.sstable.SSTableReader$4.run(SSTableReader.java:480)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
> at java.util.concurrent.FutureTask.run(FutureTask.java:262)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:745)
> "SSTableBatchOpen:1" daemon prio=10 tid=0x00007f4b399e7000 nid=0x4776 waiting
> for monitor entry [0x00007f4b2359d000]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.cassandra.db.Keyspace.open(Keyspace.java:118)
> - waiting to lock <0x00000000e35fd6d0> (a java.lang.Class for
> org.apache.cassandra.db.Keyspace)
> at org.apache.cassandra.db.Keyspace.open(Keyspace.java:99)
> at
> org.apache.cassandra.cql3.statements.SelectStatement$RawStatement.prepare(SelectStatement.java:1464)
> at
> org.apache.cassandra.cql3.QueryProcessor.getStatement(QueryProcessor.java:517)
> at
> org.apache.cassandra.cql3.QueryProcessor.parseStatement(QueryProcessor.java:265)
> at
> org.apache.cassandra.cql3.QueryProcessor.prepareInternal(QueryProcessor.java:306)
> at
> org.apache.cassandra.cql3.QueryProcessor.executeInternal(QueryProcessor.java:316)
> at
> org.apache.cassandra.db.SystemKeyspace.getSSTableReadMeter(SystemKeyspace.java:910)
> at
> org.apache.cassandra.io.sstable.SSTableReader.<init>(SSTableReader.java:561)
> at
> org.apache.cassandra.io.sstable.SSTableReader.open(SSTableReader.java:433)
> at
> org.apache.cassandra.io.sstable.SSTableReader.open(SSTableReader.java:343)
> at
> org.apache.cassandra.io.sstable.SSTableReader$4.run(SSTableReader.java:480)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
> at java.util.concurrent.FutureTask.run(FutureTask.java:262)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:745)
> "Executor task launch worker-3" daemon prio=10 tid=0x00007f4b38ce6000
> nid=0x472c waiting on condition [0x00007f4b26deb000]
> java.lang.Thread.State: TIMED_WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for <0x00000000fac03b40> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
> at
> java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:226)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2082)
> at
> java.util.concurrent.ThreadPoolExecutor.awaitTermination(ThreadPoolExecutor.java:1468)
> at
> org.apache.cassandra.io.sstable.SSTableReader.openAll(SSTableReader.java:496)
> at
> org.apache.cassandra.db.ColumnFamilyStore.<init>(ColumnFamilyStore.java:321)
> at
> org.apache.cassandra.db.ColumnFamilyStore.createColumnFamilyStore(ColumnFamilyStore.java:478)
> - locked <0x00000000e374a2b0> (a java.lang.Class for
> org.apache.cassandra.db.ColumnFamilyStore)
> at
> org.apache.cassandra.db.ColumnFamilyStore.createColumnFamilyStore(ColumnFamilyStore.java:449)
> at org.apache.cassandra.db.Keyspace.initCf(Keyspace.java:327)
> at org.apache.cassandra.db.Keyspace.<init>(Keyspace.java:280)
> at org.apache.cassandra.db.Keyspace.open(Keyspace.java:122)
> - locked <0x00000000e35fd6d0> (a java.lang.Class for
> org.apache.cassandra.db.Keyspace)
> at org.apache.cassandra.db.Keyspace.open(Keyspace.java:99)
> at
> org.apache.cassandra.cql3.statements.UpdateStatement.addUpdateForKey(UpdateStatement.java:101)
> at
> org.apache.cassandra.io.sstable.CQLSSTableWriter.rawAddRow(CQLSSTableWriter.java:225)
> at
> org.apache.cassandra.io.sstable.CQLSSTableWriter.addRow(CQLSSTableWriter.java:144)
> at
> org.apache.cassandra.io.sstable.CQLSSTableWriter.addRow(CQLSSTableWriter.java:119)
> at
> com.datastax.bdp.spark.writer.BulkTableWriter$$anonfun$write$1.apply(BulkTableWriter.scala:101)
> at
> com.datastax.bdp.spark.writer.BulkTableWriter$$anonfun$write$1.apply(BulkTableWriter.scala:97)
> at scala.collection.Iterator$class.foreach(Iterator.scala:727)
> at
> org.apache.spark.InterruptibleIterator.foreach(InterruptibleIterator.scala:28)
> at
> com.datastax.bdp.spark.writer.BulkTableWriter.write(BulkTableWriter.scala:97)
> - locked <0x00000000e0f00b78> (a
> com.datastax.bdp.spark.writer.BulkTableWriter$)
> at
> com.datastax.bdp.spark.writer.BulkTableWriter$$anonfun$saveRddToCassandra$1.apply(BulkTableWriter.scala:144)
> at
> com.datastax.bdp.spark.writer.BulkTableWriter$$anonfun$saveRddToCassandra$1.apply(BulkTableWriter.scala:144)
> at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:61)
> at org.apache.spark.scheduler.Task.run(Task.scala:56)
> at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:200)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:745)
> {noformat}
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