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https://issues.apache.org/jira/browse/CASSANDRA-6366?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Michael Shuler resolved CASSANDRA-6366.
---------------------------------------
Resolution: Not a Problem
[~exabytes18], I'm closing this ticket since it sounded as if your scrub was
successful. Feel free to re-open this, if you are still having a problem.
> Corrupt SSTables
> ----------------
>
> Key: CASSANDRA-6366
> URL: https://issues.apache.org/jira/browse/CASSANDRA-6366
> Project: Cassandra
> Issue Type: Bug
> Environment: 1.2.10, LeveledCompaction, CQL3
> Reporter: Matt Jurik
> Priority: Minor
>
> We ran into some corrupt sstables on one of our 8-node clusters running
> 1.2.10 (since upgraded to 1.2.11). Initially, we saw one corrupt sstable on a
> single node. After doing a "nodetool scrub" and then a "nodetool -pr repair"
> for the cluster, we were left with 2 nodes reporting 3 corrupt sstables.
> All nodes appear healthy; fsck and our raid controllers report no issues. The
> sstables were written out during normal operation; there were no machine
> restarts or failures anywhere near the sstable file timestamps.
> Curiously, I figured out how to read all 3 of our corrupt sstables, though I
> have no idea why this works. Additionally, it seems that I'm able to read all
> OnDiskAtoms as specified in the row header, so the data seems intact.
> {code}
> diff --git
> a/src/java/org/apache/cassandra/io/sstable/SSTableIdentityIterator.java
> b/src/java/org/apache/cassandra/io/sstable/SSTableIdentityIterator.java
> index 381fdb9..8fce5f7 100644
> --- a/src/java/org/apache/cassandra/io/sstable/SSTableIdentityIterator.java
> +++ b/src/java/org/apache/cassandra/io/sstable/SSTableIdentityIterator.java
> @@ -180,6 +180,11 @@ public class SSTableIdentityIterator implements
> Comparable<SSTableIdentityIterat
>
> public boolean hasNext()
> {
> + /*
> + * For each row where corruption is reported, it is the case that we
> read more data from the preceeding row
> + * than specified by dataSize. That is, this iterator will terminate
> with:
> + * inputWithTracker.getBytesRead() > dataSize
> + */
> return inputWithTracker.getBytesRead() < dataSize;
> }
>
> diff --git a/src/java/org/apache/cassandra/io/sstable/SSTableScanner.java
> b/src/java/org/apache/cassandra/io/sstable/SSTableScanner.java
> index 1df5842..718324c 100644
> --- a/src/java/org/apache/cassandra/io/sstable/SSTableScanner.java
> +++ b/src/java/org/apache/cassandra/io/sstable/SSTableScanner.java
> @@ -167,8 +167,9 @@ public class SSTableScanner implements ICompactionScanner
> {
> try
> {
> - if (row != null)
> - dfile.seek(finishedAt);
> + // Magically read corrupt sstables...
> + // if (row != null)
> + // dfile.seek(finishedAt);
> assert !dfile.isEOF();
>
> // Read data header
> diff --git a/src/java/org/apache/cassandra/tools/SSTableExport.java
> b/src/java/org/apache/cassandra/tools/SSTableExport.java
> index 05fe9f6..ed61010 100644
> --- a/src/java/org/apache/cassandra/tools/SSTableExport.java
> +++ b/src/java/org/apache/cassandra/tools/SSTableExport.java
> @@ -432,7 +432,7 @@ public class SSTableExport
> */
> public static void export(Descriptor desc, String[] excludes) throws
> IOException
> {
> - export(desc, System.out, excludes);
> + export(desc, new PrintStream("json"), excludes);
> }
>
> /**
> {code}
> Otherwise, I get a stacktrace such as:
> {code}
> org.apache.cassandra.io.sstable.CorruptSSTableException: java.io.IOException:
> dataSize of 72339146324312065 starting at 80476328 would be larger than file
> /Users/exabytes18/development/yay/corrupt-sstables/corrupt-files3/my_keyspace-my_table-ic-40693-Data.db
> length 109073657
> at
> org.apache.cassandra.io.sstable.SSTableIdentityIterator.<init>(SSTableIdentityIterator.java:176)
> at
> org.apache.cassandra.io.sstable.SSTableIdentityIterator.<init>(SSTableIdentityIterator.java:84)
> at
> org.apache.cassandra.io.sstable.SSTableIdentityIterator.<init>(SSTableIdentityIterator.java:70)
> at
> org.apache.cassandra.io.sstable.SSTableScanner$KeyScanningIterator.next(SSTableScanner.java:203)
> at
> org.apache.cassandra.io.sstable.SSTableScanner$KeyScanningIterator.next(SSTableScanner.java:157)
> at
> org.apache.cassandra.io.sstable.SSTableScanner.next(SSTableScanner.java:144)
> at org.apache.cassandra.tools.SSTableExport.export(SSTableExport.java:391)
> at org.apache.cassandra.tools.SSTableExport.export(SSTableExport.java:422)
> at org.apache.cassandra.tools.SSTableExport.export(SSTableExport.java:435)
> at org.apache.cassandra.tools.SSTableExport.main(SSTableExport.java:517)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606)
> at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
> Caused by: java.io.IOException: dataSize of 72339146324312065 starting at
> 80476328 would be larger than file
> /Users/exabytes18/development/yay/corrupt-sstables/corrupt-files3/my_keyspace-my_table-ic-40693-Data.db
> length 109073657
> at
> org.apache.cassandra.io.sstable.SSTableIdentityIterator.<init>(SSTableIdentityIterator.java:132)
> ... 14 more
> {code}
> Any help on the matter is appreciated.
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