[ https://issues.apache.org/jira/browse/CASSANDRA-7245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13999572#comment-13999572 ]
Brandon Williams commented on CASSANDRA-7245: --------------------------------------------- Any chance you're using HSHA? CASSANDRA-6285 which is still not yet committed (I have a reason for that) could be a factor in that case. > Out-of-Order keys with stress + CQL3 > ------------------------------------ > > Key: CASSANDRA-7245 > URL: https://issues.apache.org/jira/browse/CASSANDRA-7245 > Project: Cassandra > Issue Type: Bug > Components: Core > Reporter: Pavel Yaskevich > > We have been generating data (stress with CQL3 prepared) for CASSANDRA-4718 > and found following problem almost in every SSTable generated (~200 GB of > data and 821 SSTables). > We set up they keys to be 10 bytes in size (default) and population between 1 > and 600000000. > Once I ran 'sstablekeys' on the generated SSTable files I got following > exceptions: > _There is a problem with sorting of normal looking keys:_ > 30303039443538353645 > 30303039443745364242 > java.io.IOException: Key out of order! DecoratedKey(-217680888487824985, > *30303039443745364242*) > DecoratedKey(-1767746583617597213, > *30303039443437454333*) > 00000a30303033343933 > 37344400001388343933 > java.io.IOException: Key out of order! DecoratedKey(5440473860101999581, > *37344400001388343933*) > DecoratedKey(-7565486415339257200, > *30303033344639443137*) > 30303033354244363031 > 30303033354133423742 > java.io.IOException: Key out of order! DecoratedKey(2687072396429900180, > *30303033354133423742*) > DecoratedKey(-7838239767410066684, > *30303033354145344534*) > 30303034313442354137 > 30343136353633340000 > java.io.IOException: Key out of order! DecoratedKey(1516003874415400462, > *30343136353633340000*) > DecoratedKey(-9106177395653818217, > *30303034313333444238*) > 30303035373044373435 > 30303035373044334631 > java.io.IOException: Key out of order! DecoratedKey(-3645715702154616540, > *30303035373044334631*) > DecoratedKey(-4296696226469000945, > *30303035373132364138*) > _And completely different ones:_ > 30303041333745373543 > 7cd045c59a90d7587d8d > java.io.IOException: Key out of order! DecoratedKey(-3595402345023230196, > *7cd045c59a90d7587d8d*) > DecoratedKey(-5146766422778260690, > *30303041333943303232*) > 30303033323144444144 > 30303033323346343932 > java.io.IOException: Key out of order! DecoratedKey(7071845511166615635, > *30303033323346343932*) > DecoratedKey(5233296131921119414, > *53d83e00000012287e03*) > 30303034314531374431 > 3806734b256c27e41ec2 > java.io.IOException: Key out of order! DecoratedKey(-7720474642702543193, > *3806734b256c27e41ec2*) > DecoratedKey(-8072288379146044663, > *30303034314136413343*) > _And sometimes there is no problem at all:_ > 30303033353144463637 > 0000002a31b3b31a1c2f > 5d616dd38211ebb5d6ec > 44423645000013880000 > 00001388138844463744 > 30303033353143394343 > It's worth to mention that we have got 22 timeout exceptions but number of > out-of-order keys is much larger than that. -- This message was sent by Atlassian JIRA (v6.2#6252)