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From: "Joshua McKenzie (JIRA)" <jira@apache.org>
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Subject: [jira] [Resolved] (CASSANDRA-8192) AssertionError in Memory.java
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     [ https://issues.apache.org/jira/browse/CASSANDRA-8192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Joshua McKenzie resolved CASSANDRA-8192.
----------------------------------------
    Resolution: Won't Fix

Of memory on the heap, though we store a few things offheap.  You can use jconsole to take a look at non-heap memory usage (I'm sitting at 33MB w/1.33GB of data on a single CF, for instance).

If you're going to be running Cassandra with 512m on a 32-bit JVM and you managed to get your environment to be stable on 2.0.X, I'd recommend staying on that release or upping the amount of memory you're allocating to the database on 2.1.X.

Closing this ticket as won't fix; working with very small heaps and 32-bit JVM's isn't part of what we're focusing on for 2.1.X and 3.0.

> AssertionError in Memory.java
> -----------------------------
>
>                 Key: CASSANDRA-8192
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8192
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>         Environment: Windows-7-32 bit, 3GB RAM, Java 1.7.0_67
>            Reporter: Andreas Schnitzerling
>            Assignee: Joshua McKenzie
>         Attachments: cassandra.bat, cassandra.yaml, system.log
>
>
> Since update of 1 of 12 nodes from 2.1.0-rel to 2.1.1-rel Exception during start up.
> {panel:title=system.log}
> ERROR [SSTableBatchOpen:1] 2014-10-27 09:44:00,079 CassandraDaemon.java:153 - Exception in thread Thread[SSTableBatchOpen:1,5,main]
> java.lang.AssertionError: null
> 	at org.apache.cassandra.io.util.Memory.size(Memory.java:307) ~[apache-cassandra-2.1.1.jar:2.1.1]
> 	at org.apache.cassandra.io.compress.CompressionMetadata.<init>(CompressionMetadata.java:135) ~[apache-cassandra-2.1.1.jar:2.1.1]
> 	at org.apache.cassandra.io.compress.CompressionMetadata.create(CompressionMetadata.java:83) ~[apache-cassandra-2.1.1.jar:2.1.1]
> 	at org.apache.cassandra.io.util.CompressedSegmentedFile$Builder.metadata(CompressedSegmentedFile.java:50) ~[apache-cassandra-2.1.1.jar:2.1.1]
> 	at org.apache.cassandra.io.util.CompressedPoolingSegmentedFile$Builder.complete(CompressedPoolingSegmentedFile.java:48) ~[apache-cassandra-2.1.1.jar:2.1.1]
> 	at org.apache.cassandra.io.sstable.SSTableReader.load(SSTableReader.java:766) ~[apache-cassandra-2.1.1.jar:2.1.1]
> 	at org.apache.cassandra.io.sstable.SSTableReader.load(SSTableReader.java:725) ~[apache-cassandra-2.1.1.jar:2.1.1]
> 	at org.apache.cassandra.io.sstable.SSTableReader.open(SSTableReader.java:402) ~[apache-cassandra-2.1.1.jar:2.1.1]
> 	at org.apache.cassandra.io.sstable.SSTableReader.open(SSTableReader.java:302) ~[apache-cassandra-2.1.1.jar:2.1.1]
> 	at org.apache.cassandra.io.sstable.SSTableReader$4.run(SSTableReader.java:438) ~[apache-cassandra-2.1.1.jar:2.1.1]
> 	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) ~[na:1.7.0_55]
> 	at java.util.concurrent.FutureTask.run(Unknown Source) ~[na:1.7.0_55]
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [na:1.7.0_55]
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [na:1.7.0_55]
> 	at java.lang.Thread.run(Unknown Source) [na:1.7.0_55]
> {panel}
> In the attached log you can still see as well CASSANDRA-8069 and CASSANDRA-6283.



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