Hi,
 We are using DataStax cassandra (2 nodes)& have recently upgraded from 0.8.x to 1.0.x. Followed the steps on
http://www.datastax.com/docs/1.0/install/upgrading#upgrading-cassandra-0-8-x-to-1-0-x
however on running the final repair on Node1 we get a error message as below. Please can you guide.


 INFO [AntiEntropyStage:1] 2012-07-30 11:57:41,368 AntiEntropyService.java (line 837) [repair #a99c1a50-da0f-11e1-0000-ca50e7b510fb] requests for merkle tree sent for Standard1 (to [/172.16.0.29, /172.16.0.34])                                                                            
 INFO [AntiEntropyStage:1] 2012-07-30 11:57:41,381 AntiEntropyService.java (line 935) [repair #a99c1a50-da0f-11e1-0000-ca50e7b510fb] Endpoints /172.16.0.29 and /172.16.0.34 are consistent for Indexed1                                                                                      
 INFO [AntiEntropyStage:1] 2012-07-30 11:57:41,382 AntiEntropyService.java (line 762) [repair #a99c1a50-da0f-11e1-0000-ca50e7b510fb] Indexed1 is fully synced (1 remaining column family to sync for this session)                                                                            
 INFO [CompactionExecutor:5] 2012-07-30 12:56:15,998 AutoSavingCache.java (line 269) Saved Keyspace1-Standard1-KeyCache (35450 items) in 542 ms
 INFO [CompactionExecutor:6] 2012-07-30 13:56:16,020 AutoSavingCache.java (line 269) Saved Keyspace1-Standard1-KeyCache (35450 items) in 557 ms
ERROR [ValidationExecutor:1] 2012-07-30 14:18:51,390 AbstractCassandraDaemon.java (line 139) Fatal exception in thread Thread[ValidationExecutor:1,1,main]                                                                                                                                    
java.io.IOError: java.io.IOException: FAILED_TO_UNCOMPRESS(5)                                                                                  
        at org.apache.cassandra.db.compaction.PrecompactedRow.merge(PrecompactedRow.java:114)                                                  
        at org.apache.cassandra.db.compaction.PrecompactedRow.<init>(PrecompactedRow.java:97)                                                  
        at org.apache.cassandra.db.compaction.CompactionController.getCompactedRow(CompactionController.java:137)                              
        at org.apache.cassandra.db.compaction.CompactionIterable$Reducer.getReduced(CompactionIterable.java:97)                                
        at org.apache.cassandra.db.compaction.CompactionIterable$Reducer.getReduced(CompactionIterable.java:82)                                
        at org.apache.cassandra.utils.MergeIterator$ManyToOne.consume(MergeIterator.java:118)                                                  
        at org.apache.cassandra.utils.MergeIterator$ManyToOne.computeNext(MergeIterator.java:101)                                              
        at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:140)                                              
        at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:135)                                                       
        at com.google.common.collect.Iterators$7.computeNext(Iterators.java:614)                                                               
        at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:140)                                              
        at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:135)                                                       
        at org.apache.cassandra.db.compaction.CompactionManager.doValidationCompaction(CompactionManager.java:849)                             
        at org.apache.cassandra.db.compaction.CompactionManager.access$600(CompactionManager.java:64)                                          
        at org.apache.cassandra.db.compaction.CompactionManager$8.call(CompactionManager.java:440)                                             
        at java.util.concurrent.FutureTask$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: FAILED_TO_UNCOMPRESS(5)                                                                                        
        at org.xerial.snappy.SnappyNative.throw_error(SnappyNative.java:78)                                                                    
        at org.xerial.snappy.SnappyNative.rawUncompress(Native Method)                                                                         
        at org.xerial.snappy.Snappy.rawUncompress(Snappy.java:391)                                                                             
        at org.apache.cassandra.io.compress.SnappyCompressor.uncompress(SnappyCompressor.java:52)                                              
        at org.apache.cassandra.io.compress.CompressedRandomAccessReader.decompressChunk(CompressedRandomAccessReader.java:89)                 
        at org.apache.cassandra.io.compress.CompressedRandomAccessReader.reBuffer(CompressedRandomAccessReader.java:75)                        
        at org.apache.cassandra.io.util.RandomAccessReader.read(RandomAccessReader.java:302)                                                   
        at java.io.RandomAccessFile.readFully(RandomAccessFile.java:397)                                                                       
        at java.io.RandomAccessFile.readFully(RandomAccessFile.java:377)                                                                       
        at org.apache.cassandra.utils.BytesReadTracker.readFully(BytesReadTracker.java:95)                                                     
        at org.apache.cassandra.utils.ByteBufferUtil.read(ByteBufferUtil.java:396)                                                             
        at org.apache.cassandra.utils.ByteBufferUtil.readWithLength(ByteBufferUtil.java:358)                                                   
        at org.apache.cassandra.db.ColumnSerializer.deserialize(ColumnSerializer.java:120)                                                     
        at org.apache.cassandra.db.ColumnSerializer.deserialize(ColumnSerializer.java:37)                                                      
        at org.apache.cassandra.db.ColumnFamilySerializer.deserializeColumns(ColumnFamilySerializer.java:144)                                  
        at org.apache.cassandra.io.sstable.SSTableIdentityIterator.getColumnFamilyWithColumns(SSTableIdentityIterator.java:232)                
        at org.apache.cassandra.db.compaction.PrecompactedRow.merge(PrecompactedRow.java:110)                                                  
        ... 19 more                                                                                                                            
 INFO [CompactionExecutor:7] 2012-07-30 14:56:16,009 AutoSavingCache.java (line 269) Saved Keyspace1-Standard1-KeyCache (35450 items) in 535 ms
 INFO [CompactionExecutor:11] 2012-07-30 15:56:16,020 AutoSavingCache.java (line 269) Saved Keyspace1-Standard1-KeyCache (35450 items) in 540 ms                                                                                                                                              
 INFO [CompactionExecutor:12] 2012-07-30 16:56:16,010 AutoSavingCache.java (line 269) Saved Keyspace1-Standard1-KeyCache (35450 items) in 523 ms                                                                                                                                              
 INFO [CompactionExecutor:13] 2012-07-30 17:56:16,066 AutoSavingCache.java (line 269) Saved Keyspace1-Standard1-KeyCache (35450 items) in 574 ms                                                                                                                                              
 INFO [CompactionExecutor:14] 2012-07-30 18:56:16,080 AutoSavingCache.java (line 269) Saved Keyspace1-Standard1-KeyCache (35450 items) in 582 ms                                                                                                                                              
 INFO [CompactionExecutor:16] 2012-07-30 19:56:16,048 AutoSavingCache.java (line 269) Saved Keyspace1-Standard1-KeyCache (35450 items) in 544 ms                                                                                                                                              
 INFO [CompactionExecutor:19] 2012-07-30 20:56:16,071 AutoSavingCache.java (line 269) Saved Keyspace1-Standard1-KeyCache (35450 items) in 561 ms
 INFO [CompactionExecutor:20] 2012-07-30 21:56:16,037 AutoSavingCache.java (line 269) Saved Keyspace1-Standard1-KeyCache (35450 items) in 521 ms
 INFO [CompactionExecutor:21] 2012-07-30 22:56:16,060 AutoSavingCache.java (line 269) Saved Keyspace1-Standard1-KeyCache (35450 items) in 538 ms
 INFO [AntiEntropyStage:1] 2012-07-30 23:06:26,311 AntiEntropyService.java (line 190) [repair #a99c1a50-da0f-11e1-0000-ca50e7b510fb] Received merkle tree for Standard1 from /172.16.0.29
 INFO [CompactionExecutor:25] 2012-07-30 23:56:16,093 AutoSavingCache.java (line 269) Saved Keyspace1-Standard1-KeyCache (35450 items) in 565 ms
 INFO [CompactionExecutor:26] 2012-07-31 00:56:16,059 AutoSavingCache.java (line 269) Saved Keyspace1-Standard1-KeyCache (35450 items) in 525 ms
 INFO [CompactionExecutor:27] 2012-07-31 01:56:16,082 AutoSavingCache.java (line 269) Saved Keyspace1-Standard1-KeyCache (35450 items) in 542 ms
 INFO [CompactionExecutor:28] 2012-07-31 02:56:16,095 AutoSavingCache.java (line 269) Saved Keyspace1-Standard1-KeyCache (35450 items) in 549 ms