# When upgrading from 0.90 to 1.7 the transportClient stopped working

**URL:** <https://discuss.elastic.co/t/when-upgrading-from-0-90-to-1-7-the-transportclient-stopped-working/31710>\
**Category:** Elasticsearch\
**Created:** [October 6, 2015, 3:19pm UTC](https://discuss.elastic.co/t/when-upgrading-from-0-90-to-1-7-the-transportclient-stopped-working/31710 "2015-10-06T15:19:06Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![yairtheone](https://avatars.discourse-cdn.com/v4/letter/y/f17d59/32.png) [@yairtheone](https://discuss.elastic.co/u/yairtheone)\
**Post date:** [October 6, 2015, 3:19pm UTC](https://discuss.elastic.co/t/when-upgrading-from-0-90-to-1-7-the-transportclient-stopped-working/31710/1 "2015-10-06T15:19:06Z")

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hi ,

i have upgraded the ES cluster from 0.90.10 to 1.7 , according the documentation .  
i have upgraded the ES client to 1.7 jar too .  
but when i try using the transportClient to fetch data from the cluster it doesn't find any .  
there were some minor issue for compiling the project with 1.7 jar but i fixed them all .  
what could be the reason ?  
how can i pinpoint the problem ?

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 5, 2017, 11:46pm UTC](https://discuss.elastic.co/t/when-upgrading-from-0-90-to-1-7-the-transportclient-stopped-working/31710/2 "2017-07-05T23:46:33Z")

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