# Exec user process caused "argument list too long"

**URL:** <https://forums.docker.com/t/exec-user-process-caused-argument-list-too-long/67749>\
**Category:** General\
**Tags:** dtr, ucp, swarm\
**Created:** [January 24, 2019, 5:27pm UTC](https://forums.docker.com/t/exec-user-process-caused-argument-list-too-long/67749 "2019-01-24T17:27:33Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![fsejoseph](https://sea3.discourse-cdn.com/docker/user_avatar/forums.docker.com/fsejoseph/32/20616_2.png) [@fsejoseph](https://forums.docker.com/u/fsejoseph)\
**Post date:** [January 24, 2019, 5:27pm UTC](https://forums.docker.com/t/exec-user-process-caused-argument-list-too-long/67749/1 "2019-01-24T17:27:33Z")

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I am trying to install DTR 2.6.1. Setup if Openstack redhat ucp 18.09. UCP works (3 managers), DTR (3 workers), and 2 proxy. But I cannot get DTR to install on the first DTR node? Anyone every had this problem?

> INFO[0009] starting phase 2  
> standard\_init\_linux.go:207: exec user process caused “argument list too long”  
> FATA[0012] Failed to execute phase 2: Problem running container ‘dtr-phase2’ from image ‘docker/dtr:2.6.1’: non-zero return code returned from docker/dtr:2.6.1 : 1

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**Author:** ![fsejoseph](https://sea3.discourse-cdn.com/docker/user_avatar/forums.docker.com/fsejoseph/32/20616_2.png) [@fsejoseph](https://forums.docker.com/u/fsejoseph)\
**Post date:** [January 24, 2019, 10:21pm UTC](https://forums.docker.com/t/exec-user-process-caused-argument-list-too-long/67749/2 "2019-01-24T22:21:54Z")

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My CA was too big to work correctly. so I had to shorten my CA so it can run correctly