[jira] [Updated] (CASSANDRA-8352) Timeout Exception on Node Failure in Remote Data Center
[ https://issues.apache.org/jira/browse/CASSANDRA-8352?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Akhtar Hussain updated CASSANDRA-8352: -- Reviewer: Anuj > Timeout Exception on Node Failure in Remote Data Center > --- > > Key: CASSANDRA-8352 > URL: https://issues.apache.org/jira/browse/CASSANDRA-8352 > Project: Cassandra > Issue Type: Bug > Environment: Unix, Cassandra 2.0.3 >Reporter: Akhtar Hussain > Labels: DataCenter, GEO-Red > > We have a Geo-red setup with 2 Data centers having 3 nodes each. When we > bring down a single Cassandra node down in DC2 by kill -9 , > reads fail on DC1 with TimedOutException for a brief amount of time (15-20 > sec~). > Questions: > 1.We need to understand why reads fail on DC1 when a node in another DC > i.e. DC2 fails? As we are using LOCAL_QUORUM for both reads/writes in DC1, > request should return once 2 nodes in local DC have replied instead of timing > out because of node in remote DC. > 2.We want to make sure that no Cassandra requests fail in case of node > failures. We used rapid read protection of ALWAYS/99percentile/10ms as > mentioned in > http://www.datastax.com/dev/blog/rapid-read-protection-in-cassandra-2-0-2. > But nothing worked. How to ensure zero request failures in case a node fails? > 3.What is the right way of handling HTimedOutException exceptions in > Hector? > 4.Please confirm are we using public private hostnames as expected? > We are using Cassandra 2.0.3. -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Updated] (CASSANDRA-8352) Timeout Exception on Node Failure in Remote Data Center
[ https://issues.apache.org/jira/browse/CASSANDRA-8352?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Akhtar Hussain updated CASSANDRA-8352: -- Summary: Timeout Exception on Node Failure in Remote Data Center (was: Strange problem regarding Cassandra nodes) > Timeout Exception on Node Failure in Remote Data Center > --- > > Key: CASSANDRA-8352 > URL: https://issues.apache.org/jira/browse/CASSANDRA-8352 > Project: Cassandra > Issue Type: Bug > Environment: Unix, Cassandra 2.0.3 >Reporter: Akhtar Hussain > Labels: DataCenter, GEO-Red > > We have a Geo-red setup with 2 Data centers having 3 nodes each. When we > bring down a single Cassandra node down in DC2 by kill -9 , > reads fail on DC1 with TimedOutException for a brief amount of time (15-20 > sec~). > Questions: > 1.We need to understand why reads fail on DC1 when a node in another DC > i.e. DC2 fails? As we are using LOCAL_QUORUM for both reads/writes in DC1, > request should return once 2 nodes in local DC have replied instead of timing > out because of node in remote DC. > 2.We want to make sure that no Cassandra requests fail in case of node > failures. We used rapid read protection of ALWAYS/99percentile/10ms as > mentioned in > http://www.datastax.com/dev/blog/rapid-read-protection-in-cassandra-2-0-2. > But nothing worked. How to ensure zero request failures in case a node fails? > 3.What is the right way of handling HTimedOutException exceptions in > Hector? > 4.Please confirm are we using public private hostnames as expected? > We are using Cassandra 2.0.3. -- This message was sent by Atlassian JIRA (v6.3.4#6332)
