On Sat, Feb 4, 2012 at 7:03 AM, Jonathan Ellis <jbel...@gmail.com> wrote: > Sounds like you need to increase sysctl vm.max_map_count
This did not work. I increased vm.max_map_count from 65536 to 131072. I am still getting the same error. ERROR [SSTableBatchOpen:4] 2012-02-06 11:43:50,463 AbstractCassandraDaemon.java (line 133) Fatal exception in thread Thread[SSTableBatchOpen:4,5,main] java.io.IOError: java.io.IOException: Map failed at org.apache.cassandra.io.util.MmappedSegmentedFile$Builder.createSegments(MmappedSegmentedFile.java:225) at org.apache.cassandra.io.util.MmappedSegmentedFile$Builder.complete(MmappedSegmentedFile.java:202) at org.apache.cassandra.io.sstable.SSTableReader.load(SSTableReader.java:380) at org.apache.cassandra.io.sstable.SSTableReader.open(SSTableReader.java:159) at org.apache.cassandra.io.sstable.SSTableReader$1.run(SSTableReader.java:197) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662) Caused by: java.io.IOException: Map failed -- Regards, Ajeet