Michael Fong created CASSANDRA-11624:
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Summary: 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
Reporter: Michael Fong
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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