A Journey of a Thousand Miles Begins with a Single Step

Code Review - Boolean's Delight

Did some code review and saw some fancy lines :-( It is about JSON handling with Jackson. Basically is about how to determine that a given JsonNode is not null and a container.

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Major logstash changes in the email output plugin

Today I was looking on the upgrade of logstash 1.5.4 to newest version 2.2.0 in the office. There are some configuration breakers. One of them, is in the email output plugin.

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Disable shard allocation of your Elasticsearch nodes

If you going to upgrade your cluster or restart a node, it is wise to disable the shard allocation on that node. This prevents Elasticsearch from rebalancing missing shards until you tell it otherwise. This post demonstrates how to disable and enable shart allocation.

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Check for running Elasticsearch instance in a shell script

This small shell script checks if an Elasticsearch instance is running by querying the REST API.

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Parsing output with multiple whitespace

This post demonstrates how to parse output separated with multiple whitespace in the bash/shell.

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Delete multiple documents from an Elasticsearch Index

This post demonstrates how to delete documents from an Index in Elasticsearch, that meet you search criteria of a query. You may have situations, that you are reporting to a wrong index. Therefore this post gives you an solution how you can clean up your index.

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