# Conditional Pipeline Logic **URL:** \ **Category:** Logstash\ **Created:** [April 9, 2020, 6:42pm UTC](https://discuss.elastic.co/t/conditional-pipeline-logic/227390 "2020-04-09T18:42:26Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![InfiniteLoops](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/infiniteloops/32/47144_2.png) [@InfiniteLoops](https://discuss.elastic.co/u/InfiniteLoops)\ **Post date:** [April 9, 2020, 6:42pm UTC](https://discuss.elastic.co/t/conditional-pipeline-logic/227390/1 "2020-04-09T18:42:26Z")
Logstash with an input A sending to outputs B and C. If B or C fails everything becomes blocked. If the loss of data is acceptable is the below setup possible. So if a failure occurs in the first pipeline the system switches to using the second and if that fails then it tries the third. Three pipelines If{1. A - \> B + C }else{ 2. A -\> B }else 3. A -\> C Other advice or solutions welcome on what to do in the first case if one of the outputs is blocked ---
**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\ **Post date:** [April 9, 2020, 10:32pm UTC](https://discuss.elastic.co/t/conditional-pipeline-logic/227390/2 "2020-04-09T22:32:43Z")
Take a look at the [output isolator](https://www.elastic.co/guide/en/logstash/current/pipeline-to-pipeline.html#output-isolator-pattern) pattern. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [May 7, 2020, 10:32pm UTC](https://discuss.elastic.co/t/conditional-pipeline-logic/227390/3 "2020-05-07T22:32:46Z")
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