Hello all.
I have an error when trying to dump SSTable (Cassandra 3.11.1):
$ sstabledump mc-56801-big-Data.db
Exception in thread "main" FSWriteError in
/var/lib/cassandra/data/<keyspace>/<table>/mc-56801-big-Summary.db
at
org.apache.cassandra.io.util.FileUtils.deleteWithConfirm(FileUtils.java:142)
at
org.apache.cassandra.io.util.FileUtils.deleteWithConfirm(FileUtils.java:159)
at
org.apache.cassandra.io.sstable.format.SSTableReader.saveSummary(SSTableReader.java:935)
at
org.apache.cassandra.io.sstable.format.SSTableReader.saveSummary(SSTableReader.java:920)
at
org.apache.cassandra.io.sstable.format.SSTableReader.load(SSTableReader.java:788)
at
org.apache.cassandra.io.sstable.format.SSTableReader.load(SSTableReader.java:731)
at
org.apache.cassandra.io.sstable.format.SSTableReader.open(SSTableReader.java:516)
at
org.apache.cassandra.io.sstable.format.SSTableReader.openNoValidation(SSTableReader.java:396)
at
org.apache.cassandra.tools.SSTableExport.main(SSTableExport.java:191)
Caused by: java.nio.file.AccessDeniedException:
/var/lib/cassandra/data/<keyspace>/<table>/mc-56801-big-Summary.db
at
sun.nio.fs.UnixException.translateToIOException(UnixException.java:84)
at
sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102)
at
sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107)
at
sun.nio.fs.UnixFileSystemProvider.implDelete(UnixFileSystemProvider.java:244)
at
sun.nio.fs.AbstractFileSystemProvider.delete(AbstractFileSystemProvider.java:103)
at java.nio.file.Files.delete(Files.java:1126)
at
org.apache.cassandra.io.util.FileUtils.deleteWithConfirm(FileUtils.java:136)
... 8 more
Seems that sstabledump tries to delete and recreate summary file which I
think is risky because external modification to files that should be
modified only by Cassandra itself can lead to unpredictable behavior.
When I copy all related files and change it's owner to myself and run
sstabledump in that directory then Summary.db file is recreated but it's
md5 is exactly the same as original Summary.db's file.
I indeed have changed bloom_filter_fp_chance couple months ago, so I
believe that's the reason why SSTableReader wants to recreate summary file.
After nodetool scrub an error still happens.
I have not found any issues like this in bug tracker.
Shouldn't sstabledump be read only?
--
Best regards,
Python_Max.
