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https://issues.apache.org/jira/browse/CASSANDRA-3573?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13162864#comment-13162864
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Vitalii Tymchyshyn commented on CASSANDRA-3573:
-----------------------------------------------
In case when someone get int othis trap, I could replace Snappy compression
class with NOOP one and restart:
public class SnappyCompressor implements ICompressor
{
public static final SnappyCompressor instance = new SnappyCompressor();
public static SnappyCompressor create(Map<String, String>
compressionOptions)
{
// no specific options supported so far
return instance;
}
public int initialCompressedBufferLength(int chunkLength)
{
return chunkLength;
}
public int compress(byte[] input, int inputOffset, int inputLength,
ICompressor.WrappedArray output, int outputOffset) throws IOException
{
System.arraycopy(input, inputOffset, output.buffer, outputOffset,
inputLength);
return inputLength;
}
public int uncompress(byte[] input, int inputOffset, int inputLength,
byte[] output, int outputOffset) throws IOException
{
System.arraycopy(input, inputOffset, output, outputOffset, inputLength);
return inputLength;
}
}
> When Snappy compression is not available on the platform, trying to enable it
> introduces problems
> -------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-3573
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3573
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Affects Versions: 1.0.5
> Environment: FreeBSD
> Reporter: Vitalii Tymchyshyn
>
> I've tried to enable compression for some column families in my cluster using
> Snappy compression.
> It does not work and I am having problems with schema updates to remove it (a
> lot of UNREACHABLE nodes during scema update).
> In log I have the next:
> ERROR [FlushWriter:961] 2011-12-05 17:16:33,383 AbstractCassandraDaemon.java
> (line 133) Fatal exception in thread Thread[Flu
> shWriter:961,5,main]
> java.lang.NoClassDefFoundError: Could not initialize class
> org.xerial.snappy.Snappy
> at
> org.apache.cassandra.io.compress.SnappyCompressor.initialCompressedBufferLength(SnappyCompressor.java:39)
> at
> org.apache.cassandra.io.compress.CompressedSequentialWriter.<init>(CompressedSequentialWriter.java:63)
> at
> org.apache.cassandra.io.compress.CompressedSequentialWriter.open(CompressedSequentialWriter.java:34)
> at
> org.apache.cassandra.io.sstable.SSTableWriter.<init>(SSTableWriter.java:91)
> at
> org.apache.cassandra.db.ColumnFamilyStore.createFlushWriter(ColumnFamilyStore.java:1850)
> at
> org.apache.cassandra.db.Memtable.writeSortedContents(Memtable.java:250)
> at org.apache.cassandra.db.Memtable.access$400(Memtable.java:47)
> at org.apache.cassandra.db.Memtable$4.runMayThrow(Memtable.java:291)
> at
> org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:30)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> at java.lang.Thread.run(Thread.java:679)
> It looks like Snappy can't initialize because it does not have native library
> for my platform. It would be great if:
> 1) A check be done on schema update if Snappy can be used
> 2) If it is enabled and can't be used it would still work without compression
> writes (but may be outputting some errors to indicate the situation)
>
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