[jira] [Updated] (CASSANDRA-13632) Digest mismatch if row is empty
[ https://issues.apache.org/jira/browse/CASSANDRA-13632?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Brandon Williams updated CASSANDRA-13632: - Resolution: Cannot Reproduce Status: Resolved (was: Open) Closing due to inactivity and I don't believe this is still an issue, but please reopen if I'm incorrect. > Digest mismatch if row is empty > --- > > Key: CASSANDRA-13632 > URL: https://issues.apache.org/jira/browse/CASSANDRA-13632 > Project: Cassandra > Issue Type: Bug > Components: Legacy/Local Write-Read Paths >Reporter: Andrew Whang >Assignee: Andrew Whang >Priority: Normal > Fix For: 3.0.x > > > This issue is similar to CASSANDRA-12090. Quorum read queries that include a > column selector (non-wildcard) result in digest mismatch when the row is > empty (key does not exist). It seems the data serialization path checks if > rowIterator.isEmpty() and if so ignores column names (by setting IS_EMPTY > flag). However, the digest serialization path does not perform this check and > includes column names. The digest comparison results in a mismatch. The > mismatch does not end up issuing a read repair mutation since the underlying > data is the same. > The mismatch on the read path ends up doubling our p99 read latency. We > discovered this issue while testing a 2.2.5 to 3.0.13 upgrade. > One thing to note is that we're using thrift, which ends up handling the > ColumnFilter differently than the CQL path. > As with CASSANDRA-12090, fixing the digest seems sensible. -- This message was sent by Atlassian Jira (v8.3.4#803005) - To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org
[jira] [Updated] (CASSANDRA-13632) Digest mismatch if row is empty
[ https://issues.apache.org/jira/browse/CASSANDRA-13632?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Brandon Williams updated CASSANDRA-13632: - Status: Open (was: Patch Available) > Digest mismatch if row is empty > --- > > Key: CASSANDRA-13632 > URL: https://issues.apache.org/jira/browse/CASSANDRA-13632 > Project: Cassandra > Issue Type: Bug > Components: Legacy/Local Write-Read Paths >Reporter: Andrew Whang >Assignee: Andrew Whang >Priority: Normal > Fix For: 3.0.x > > > This issue is similar to CASSANDRA-12090. Quorum read queries that include a > column selector (non-wildcard) result in digest mismatch when the row is > empty (key does not exist). It seems the data serialization path checks if > rowIterator.isEmpty() and if so ignores column names (by setting IS_EMPTY > flag). However, the digest serialization path does not perform this check and > includes column names. The digest comparison results in a mismatch. The > mismatch does not end up issuing a read repair mutation since the underlying > data is the same. > The mismatch on the read path ends up doubling our p99 read latency. We > discovered this issue while testing a 2.2.5 to 3.0.13 upgrade. > One thing to note is that we're using thrift, which ends up handling the > ColumnFilter differently than the CQL path. > As with CASSANDRA-12090, fixing the digest seems sensible. -- This message was sent by Atlassian Jira (v8.3.4#803005) - To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org
[jira] [Updated] (CASSANDRA-13632) Digest mismatch if row is empty
[ https://issues.apache.org/jira/browse/CASSANDRA-13632?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Michael Shuler updated CASSANDRA-13632: --- Fix Version/s: (was: 3.0.14) 3.0.x > Digest mismatch if row is empty > --- > > Key: CASSANDRA-13632 > URL: https://issues.apache.org/jira/browse/CASSANDRA-13632 > Project: Cassandra > Issue Type: Bug > Components: Local Write-Read Paths >Reporter: Andrew Whang > Fix For: 3.0.x > > > This issue is similar to CASSANDRA-12090. Quorum read queries that include a > column selector (non-wildcard) result in digest mismatch when the row is > empty (key does not exist). It seems the data serialization path checks if > rowIterator.isEmpty() and if so ignores column names (by setting IS_EMPTY > flag). However, the digest serialization path does not perform this check and > includes column names. The digest comparison results in a mismatch. The > mismatch does not end up issuing a read repair mutation since the underlying > data is the same. > The mismatch on the read path ends up doubling our p99 read latency. We > discovered this issue while testing a 2.2.5 to 3.0.13 upgrade. > One thing to note is that we're using thrift, which ends up handling the > ColumnFilter differently than the CQL path. > As with CASSANDRA-12090, fixing the digest seems sensible. -- This message was sent by Atlassian JIRA (v6.4.14#64029) - To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org
[jira] [Updated] (CASSANDRA-13632) Digest mismatch if row is empty
[ https://issues.apache.org/jira/browse/CASSANDRA-13632?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Andrew Whang updated CASSANDRA-13632: - Summary: Digest mismatch if row is empty (was: Digest mismatch if (non-static) column is null) > Digest mismatch if row is empty > --- > > Key: CASSANDRA-13632 > URL: https://issues.apache.org/jira/browse/CASSANDRA-13632 > Project: Cassandra > Issue Type: Bug > Components: Local Write-Read Paths >Reporter: Andrew Whang > Fix For: 3.0.14 > > > This issue is similar to CASSANDRA-12090. Quorum read queries that include a > column selector (non-wildcard) result in digest mismatch when the row is > empty (key does not exist). It seems the data serialization path checks if > rowIterator.isEmpty() and if so ignores column names (by setting IS_EMPTY > flag). However, the digest serialization path does not perform this check and > includes column names. The digest comparison results in a mismatch. The > mismatch does not end up issuing a read repair mutation since the underlying > data is the same. > The mismatch on the read path ends up doubling our p99 read latency. We > discovered this issue while testing a 2.2.5 to 3.0.13 upgrade. > One thing to note is that we're using thrift, which ends up handling the > ColumnFilter differently than the CQL path. > As with CASSANDRA-12090, fixing the digest seems sensible. -- This message was sent by Atlassian JIRA (v6.4.14#64029) - To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org
