Pavel Yaskevich created CASSANDRA-7245: ------------------------------------------
Summary: 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 get following exceptions: 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) There is also 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) 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)