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From Daniel <dani...@outbrain.com>
Subject Re: java.lang.OutOfMemoryError: Map failed
Date Mon, 21 Jun 2010 18:30:33 GMT
I am no expert in Cassandra, but it looks like you might get your answer 
from reading this thread:
http://www.mail-archive.com/user@cassandra.apache.org/msg03702.html

Daniel.

On 06/21/2010 06:35 PM, jeff@javajet.com wrote:
> I am using Lucandra to write Lucene documents to my cassandra server. 
> I am processing a MySQL table of about 700k records, 10k at a time. 
> All goes well until I reach about 220k mark. Figure it has something 
> to do with my lack of correct memory configuration for JVM, keyspace 
> or Cassandra.
>
> The Map failed is thrown for many *.db files and Cassandra fails to 
> start with java.lang.OutOfMemoryError: unable to create new native 
> thread message.
>
> ERROR 11:31:49,137 Corrupt file 
> /var/lib/cassandra/data/Lucandra/TermInfo-256-Data.db; skipped
> java.io.IOException: Map failed
>         at sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:819)
>         at 
> org.apache.cassandra.io.SSTableReader.mmap(SSTableReader.java:208)
>         at 
> org.apache.cassandra.io.SSTableReader.<init>(SSTableReader.java:154)
>         at 
> org.apache.cassandra.io.SSTableReader.<init>(SSTableReader.java:218)
>         at 
> org.apache.cassandra.io.SSTableReader.open(SSTableReader.java:123)
>         at 
> org.apache.cassandra.io.SSTableReader.open(SSTableReader.java:114)
>         at 
> org.apache.cassandra.db.ColumnFamilyStore.<init>(ColumnFamilyStore.java:178) 
>
>         at 
> org.apache.cassandra.db.ColumnFamilyStore.createColumnFamilyStore(ColumnFamilyStore.java:248)

>
>         at org.apache.cassandra.db.Table.<init>(Table.java:338)
>         at org.apache.cassandra.db.Table.open(Table.java:199)
>         at 
> org.apache.cassandra.thrift.CassandraDaemon.setup(CassandraDaemon.java:91) 
>
>         at 
> org.apache.cassandra.thrift.CassandraDaemon.main(CassandraDaemon.java:177) 
>
> Caused by: java.lang.OutOfMemoryError: Map failed
>         at sun.nio.ch.FileChannelImpl.map0(Native Method)
>         at sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:816)
>         ... 11 more
>  INFO 11:31:49,140 Replaying 
> /var/lib/cassandra/commitlog/CommitLog-1277133857874.log
> ERROR 11:31:49,146 Exception encountered during startup.
> java.lang.OutOfMemoryError: unable to create new native thread
>         at java.lang.Thread.start0(Native Method)
>         at java.lang.Thread.start(Thread.java:614)
>         at 
> java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:943) 
>
>         at 
> java.util.concurrent.ThreadPoolExecutor.prestartAllCoreThreads(ThreadPoolExecutor.java:1549)

>
>         at 
> org.apache.cassandra.concurrent.JMXEnabledThreadPoolExecutor.<init>(JMXEnabledThreadPoolExecutor.java:51)

>
>         at 
> org.apache.cassandra.concurrent.JMXConfigurableThreadPoolExecutor.<init>(JMXConfigurableThreadPoolExecutor.java:34)

>
>         at 
> org.apache.cassandra.concurrent.StageManager.multiThreadedConfigurableStage(StageManager.java:81)

>
>         at 
> org.apache.cassandra.concurrent.StageManager.<clinit>(StageManager.java:53) 
>
>         at 
> org.apache.cassandra.db.commitlog.CommitLog.recover(CommitLog.java:259)
>         at 
> org.apache.cassandra.db.commitlog.CommitLog.recover(CommitLog.java:173)
>         at 
> org.apache.cassandra.thrift.CassandraDaemon.setup(CassandraDaemon.java:95) 
>
>         at 
> org.apache.cassandra.thrift.CassandraDaemon.main(CassandraDaemon.java:177) 
>
> Exception encountered during startup.
>
>
> Jeffrey Griffin, Developer
> *JavaJet Consulting  LLC*
> o: 1.717.533.5557
> m: 1.717.419.2869
> skype: javajet.coder
>


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