{"action":"opened","issue":{"url":"https://api.github.com/repos/nextflow-io/nextflow/issues/691","repository_url":"https://api.github.com/repos/nextflow-io/nextflow","labels_url":"https://api.github.com/repos/nextflow-io/nextflow/issues/691/labels{/name}","comments_url":"https://api.github.com/repos/nextflow-io/nextflow/issues/691/comments","events_url":"https://api.github.com/repos/nextflow-io/nextflow/issues/691/events","html_url":"https://github.com/nextflow-io/nextflow/issues/691","id":321299254,"number":691,"title":"container null being ignored when default container is specified","user":{"login":"msmootsgi","id":22308243,"avatar_url":"https://avatars3.githubusercontent.com/u/22308243?v=4","gravatar_id":"","url":"https://api.github.com/users/msmootsgi","html_url":"https://github.com/msmootsgi","followers_url":"https://api.github.com/users/msmootsgi/followers","following_url":"https://api.github.com/users/msmootsgi/following{/other_user}","gists_url":"https://api.github.com/users/msmootsgi/gists{/gist_id}","starred_url":"https://api.github.com/users/msmootsgi/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/msmootsgi/subscriptions","organizations_url":"https://api.github.com/users/msmootsgi/orgs","repos_url":"https://api.github.com/users/msmootsgi/repos","events_url":"https://api.github.com/users/msmootsgi/events{/privacy}","received_events_url":"https://api.github.com/users/msmootsgi/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2018-05-08T18:36:13Z","updated_at":"2018-05-08T18:36:13Z","closed_at":null,"author_association":"CONTRIBUTOR","body":"As of version 0.29.0 of nextflow, if a default docker container is specified in `nextflow.config` that container is used even if a process has `container null` specified.  In prior versions no container was used if `container null` was specified.  I've attached a small project that illustrates this problem (assuming you're running on Linux and you're not using Ubuntu 18.04).\r\n\r\nHere's the differing output:\r\n\r\n```\r\n$ NXF_VER=0.28.1 nextflow run main.nf \r\nN E X T F L O W  ~  version 0.28.1\r\nLaunching `main.nf` [high_ride] - revision: 13b975c7e1\r\n[warm up] executor > local\r\n[31/43a2a8] Submitted process > print_default\r\n[ed/43a419] Submitted process > print_local\r\nLocal OS: PRETTY_NAME=\"CentOS Linux 7 (Core)\"\r\n\r\nContainer OS: PRETTY_NAME=\"Ubuntu 18.04 LTS\"\r\n\r\n```\r\n\r\nand\r\n```\r\n$ NXF_VER=0.29.0 nextflow run main.nf \r\nN E X T F L O W  ~  version 0.29.0\r\nLaunching `main.nf` [stupefied_turing] - revision: 13b975c7e1\r\n[warm up] executor > local\r\n[98/8c4f81] Submitted process > print_default\r\n[33/d83910] Submitted process > print_local\r\nContainer OS: PRETTY_NAME=\"Ubuntu 18.04 LTS\"\r\n\r\nLocal OS: PRETTY_NAME=\"Ubuntu 18.04 LTS\"\r\n\r\n\r\n```\r\n\r\n[nextflow_container_null.tar.gz](https://github.com/nextflow-io/nextflow/files/1985191/nextflow_container_null.tar.gz)\r\n\r\n\r\n"}}
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