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https://issues.apache.org/jira/browse/CASSANDRA-11624?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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C. Scott Andreas updated CASSANDRA-11624:
-----------------------------------------
    Component/s: Tools

> Scrub does not seem to work on previously marked corrupted SSTables
> -------------------------------------------------------------------
>
>                 Key: CASSANDRA-11624
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11624
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Tools
>            Reporter: Michael Fong
>            Priority: Major
>
> We ran into a scenario that scrub does not seem to work on a previously 
> marked-as-corrupted SSTable. 
> Here is the log snippet related to the corrupted SSTable and scrub-attempt :
> ERROR [ReadStage:174] 2016-03-17 04:14:39,658 CassandraDaemon.java (line 258) 
> Exception in thread Thread[ReadStage:174,5,main]
> java.lang.RuntimeException: 
> org.apache.cassandra.io.sstable.CorruptSSTableException: java.io.IOException: 
> mmap segment underflow; remaining is 10197 but 30062 requested for 
> /data/ng/db/data/wsg/dpStatusRealTime/wsg-dpStatusRealTime-ic-2-Data.db
>         at 
> org.apache.cassandra.service.StorageProxy$DroppableRunnable.run(StorageProxy.java:2022)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
>         at java.lang.Thread.run(Thread.java:745)
> Caused by: org.apache.cassandra.io.sstable.CorruptSSTableException: 
> java.io.IOException: mmap segment underflow; remaining is 10197 but 30062 
> requested for 
> /data/ng/db/data/wsg/dpStatusRealTime/wsg-dpStatusRealTime-ic-2-Data.db
>         at 
> org.apache.cassandra.db.columniterator.IndexedSliceReader.<init>(IndexedSliceReader.java:97)
>         at 
> org.apache.cassandra.db.columniterator.SSTableSliceIterator.createReader(SSTableSliceIterator.java:65)
>         at 
> org.apache.cassandra.db.columniterator.SSTableSliceIterator.<init>(SSTableSliceIterator.java:42)
>         at 
> org.apache.cassandra.db.filter.SliceQueryFilter.getSSTableColumnIterator(SliceQueryFilter.java:238)
>         at 
> org.apache.cassandra.db.filter.QueryFilter.getSSTableColumnIterator(QueryFilter.java:62)
>         at 
> org.apache.cassandra.db.CollationController.collectAllData(CollationController.java:250)
>         at 
> org.apache.cassandra.db.CollationController.getTopLevelColumns(CollationController.java:53)
>         at 
> org.apache.cassandra.db.ColumnFamilyStore.getTopLevelColumns(ColumnFamilyStore.java:1642)
>         at 
> org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamilyStore.java:1461)
>         at org.apache.cassandra.db.Keyspace.getRow(Keyspace.java:340)
>         at 
> org.apache.cassandra.db.SliceFromReadCommand.getRow(SliceFromReadCommand.java:89)
>         at 
> org.apache.cassandra.service.StorageProxy$LocalReadRunnable.runMayThrow(StorageProxy.java:1445)
>         at 
> org.apache.cassandra.service.StorageProxy$DroppableRunnable.run(StorageProxy.java:2010)
>         ... 3 more
>  INFO [CompactionExecutor:98] 2016-03-17 04:14:39,693 OutputHandler.java 
> (line 42) Scrubbing 
> SSTableReader(path='/data/ng/db/data/wsg/dpStatusRealTime/wsg-dpStatusRealTime-jb-11-Data.db')
>  (2230223 bytes)
>  INFO [CompactionExecutor:98] 2016-03-17 04:14:39,751 OutputHandler.java 
> (line 42) Scrub of 
> SSTableReader(path='/data/ng/db/data/wsg/dpStatusRealTime/wsg-dpStatusRealTime-jb-11-Data.db')
>  complete: 2 rows in new sstable and 0 empty (tombstoned) rows dropped
> ------------------
> Below is the file information around that time
> ------------------
> -bash-4.1$ ls -alF /data/ng/db/data/wsg/dpStatusRealTime/
> total 2328
> drwxr-xr-x   2 root root    4096 Mar 17 04:14 ./
> drwxr-xr-x 264 root root   12288 Mar 16 06:48 ../
> -rw-r--r--   1 root root   72995 Mar 16 07:08 
> wsg-dpStatusRealTime-ic-2-Data.db
> -rw-r--r--   1 root root      75 Mar 16 07:08 
> wsg-dpStatusRealTime-ic-2-Digest.sha1
> -rw-r--r--   1 root root      16 Mar 16 07:08 
> wsg-dpStatusRealTime-ic-2-Filter.db
> -rw-r--r--   1 root root     132 Mar 16 07:08 
> wsg-dpStatusRealTime-ic-2-Index.db
> -rw-r--r--   1 root root    5956 Mar 16 07:08 
> wsg-dpStatusRealTime-ic-2-Statistics.db
> -rw-r--r--   1 root root     244 Mar 16 07:20 
> wsg-dpStatusRealTime-ic-2-Summary.db
> -rw-r--r--   1 root root      72 Mar 16 07:08 
> wsg-dpStatusRealTime-ic-2-TOC.txt
> -rw-r--r--   1 root root     144 Mar 17 04:14 
> wsg-dpStatusRealTime-jb-12-CRC.db
> -rw-r--r--   1 root root 2230223 Mar 17 04:14 
> wsg-dpStatusRealTime-jb-12-Data.db
> -rw-r--r--   1 root root      76 Mar 17 04:14 
> wsg-dpStatusRealTime-jb-12-Digest.sha1
> -rw-r--r--   1 root root     336 Mar 17 04:14 
> wsg-dpStatusRealTime-jb-12-Filter.db
> -rw-r--r--   1 root root    1424 Mar 17 04:14 
> wsg-dpStatusRealTime-jb-12-Index.db
> -rw-r--r--   1 root root    6004 Mar 17 04:14 
> wsg-dpStatusRealTime-jb-12-Statistics.db
> -rw-r--r--   1 root root     244 Mar 17 04:14 
> wsg-dpStatusRealTime-jb-12-Summary.db
> -rw-r--r--   1 root root      79 Mar 17 04:14 
> wsg-dpStatusRealTime-jb-12-TOC.txt
> --------------------------
> 1. Please note that the corrupted file is in (ic) version, which is 1.2.19. 
> This test bed was upgraded and attempted to upgradesstable a day ago. There 
> has been some read/write to that column family before upgradesstable was 
> performed - but I do not have log for that :(
> 2. I manually performed the scrub/compact operation with nodetool and the 
> result is the same: 
> INFO [CompactionExecutor:103] 2016-03-17 07:09:53,444 CompactionTask.java 
> (line 123) Compacting 
> [SSTableReader(path='/data/ng/db/data/wsg/dpStatusRealTime/wsg-dpStatusRealTime-jb-14-Data.db'),
>  
> SSTableReader(path='/data/ng/db/data/wsg/dpStatusRealTime/wsg-dpStatusRealTime-jb-15-Data.db')]
>  
> Our test environment was Cassandra 2.0.17 with max heap set with 8 gigabytes. 



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