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Sunday, March 29, 2015

My journey and experience on upgrading apache cassandra 1.0.8 to 1.0.12

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Upon request of my blog reader, today I will share with you my experience on upgrading apache cassandra version 1.0.8 to 1.0.12 on a produc...
Saturday, March 28, 2015

Investigate into apache cassandra corrupt sstable exception

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Today, we will take a look at another apache cassandra 1.0.8 exception. Example of stack trace below. ERROR [SSTableBatchOpen:2] 2015-03-07 ...
Friday, March 27, 2015

Investigate into apache cassandra get_slice assertion error

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Today, we will investigate another error from apache cassandra. Error as shown below in cassandra log. ERROR [Thrift:2] 2015-02-11 11:06:10,...
Sunday, March 15, 2015

Investigate into elasticsearch already flushing exception

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Today, we will take a look at another elasticsearch issue. The example of message output in the log file happened in one of my node. [2015-...
Saturday, March 14, 2015

Investigate into elasticsearch indices memory marking shard active or inactive

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If you have enable logging for indices memory controller indices.memory: DEBUG in logging.yml in elasticsearch 0.90 to see how is the sha...
Friday, March 13, 2015

check out java wait, notify and notifyAll method

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If you have been program java for a while already, you will most probably encounter method such as wait , notify and notifyAll . Example sc...
Sunday, March 1, 2015

Study logic elasticsearch discovery zen fd ping_timeout and ping_retries

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Today, we are going to study two parameter from elasticsearch version 0.90.7, specifically discovery.zen.fd.ping_timeout discovery.zen....