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https://issues.apache.org/jira/browse/CASSANDRA-8192?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14185547#comment-14185547
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Joshua McKenzie commented on CASSANDRA-8192:
--------------------------------------------

Could you attach your cassandra.yaml and your system.log from start up to when 
you saw this error?  Either native or JEMallocator is failing to allocate 
memory so peer is null (Memory.java:56) and I have a hunch it may have to do 
with you being on 32-bit Windows.

> 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: 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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