you should probably look to see what errno 17 means for the link system call on your system.
On Tue, May 3, 2011 at 9:52 AM, Mck <m...@apache.org> wrote: > Running a 3 node cluster with cassandra-0.8.0-beta1 > > I'm seeing the first node logging many (thousands) times lines like > > > Caused by: java.io.IOException: Unable to create hard link > from > /iad/finn/countstatistics/cassandra-data/countstatisticsCount/thrift_no_finntech_countstats_count_Count_1299479381593068337-f-5504-Data.db > to > /iad/finn/countstatistics/cassandra-data/countstatisticsCount/snapshots/compact-thrift_no_finntech_countstats_count_Count_1299479381593068337/thrift_no_finntech_countstats_count_Count_1299479381593068337-f-5504-Data.db > (errno 17) > > > This seems to happen for all column families (including system). > It happens a lot during startup. > > The hardlinks do exist. Stopping, deleting the hardlinks, and starting > again does not help. > > But i haven't seen it once on the other nodes... > > ~mck > > > ps the stacktrace > > > java.io.IOError: java.io.IOException: Unable to create hard link from > /iad/finn/countstatistics/cassandra-data/countstatisticsCount/thrift_no_finntech_countstats_count_Count_1299479381593068337-f-3875-Data.db > to > /iad/finn/countstatistics/cassandra-data/countstatisticsCount/snapshots/compact-thrift_no_finntech_countstats_count_Count_1299479381593068337/thrift_no_finntech_countstats_count_Count_1299479381593068337-f-3875-Data.db > (errno 17) > at > org.apache.cassandra.db.ColumnFamilyStore.snapshotWithoutFlush(ColumnFamilyStore.java:1629) > at > org.apache.cassandra.db.ColumnFamilyStore.snapshot(ColumnFamilyStore.java:1654) > at org.apache.cassandra.db.Table.snapshot(Table.java:198) > at > org.apache.cassandra.db.CompactionManager.doCompaction(CompactionManager.java:504) > at > org.apache.cassandra.db.CompactionManager$1.call(CompactionManager.java:146) > at > org.apache.cassandra.db.CompactionManager$1.call(CompactionManager.java:112) > at java.util.concurrent.FutureTask$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: Unable to create hard link from > /iad/finn/countstatistics/cassandra-data/countstatisticsCount/thrift_no_finntech_countstats_count_Count_1299479381593068337-f-3875-Data.db > to > /iad/finn/countstatistics/cassandra-data/countstatisticsCount/snapshots/compact-thrift_no_finntech_countstats_count_Count_1299479381593068337/thrift_no_finntech_countstats_count_Count_1299479381593068337-f-3875-Data.db > (errno 17) > at > org.apache.cassandra.utils.CLibrary.createHardLink(CLibrary.java:155) > at > org.apache.cassandra.io.sstable.SSTableReader.createLinks(SSTableReader.java:713) > at > org.apache.cassandra.db.ColumnFamilyStore.snapshotWithoutFlush(ColumnFamilyStore.java:1622) > ... 10 more > > > > -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of DataStax, the source for professional Cassandra support http://www.datastax.com
