Relay and Watchmen synchronization fail outright on Linux

[snelzing]

I am having issues with a yarn and React Native project and getting Relay and Watchmen to behave. So I made another example project to isolate it down to just watchmen, relay, and the bare minimum of what else was needed to have a project that runs. 

https://github.com/snelzing/Relay-and-Watchman-Practice-project

Even in this simple project, Watchmen fails to run and gets the same error. Here is the error (sorry it is long and gnarly, but I figured I needed to show the complete error)

This happens on Debian Bookworm, Linux Mint Una, and Ubuntu focal.

yarn run v1.22.22  
$ relay-compiler --watch  
[INFO] Querying files to compile...  
[ERROR] Watchman error: The watchman server reported an error: "watchman::QueryExecError: query failed: synchronization failed: ", while executing command: QueryRequest(  
    "query",  
    "/workspaces/Relay-and-Watchman-Practice-project",  
    QueryRequestCommon {  
        glob: None,  
        glob_noescape: false,  
        glob_includedotfiles: false,  
        path: Some(  
            [  
                RecursivePath(  
                    "",  
                ),  
            ],  
        ),  
        suffix: None,  
        since: None,  
        relative_root: None,  
        expression: Some(  
            All(  
                [  
                    FileType(  
                        Regular,  
                    ),  
                    Any(  
                        [  
                            All(  
                                [  
                                    All(  
                                        [  
                                            DirName(  
                                                DirNameTerm {  
                                                    path: "src",  
                                                    depth: None,  
                                                },  
                                            ),  
                                            Suffix(  
                                                [  
                                                    "js",  
                                                    "jsx",  
                                                ],  
                                            ),  
                                        ],  
                                    ),  
                                    Not(  
                                        Any(  
                                            [  
                                                Match(  
                                                    MatchTerm {  
                                                        glob: "**/node_modules/**",  
                                                        wholename: true,  
                                                        include_dot_files: false,  
                                                        no_escape: false,  
                                                    },  
                                                ),  
                                                Match(  
                                                    MatchTerm {  
                                                        glob: "**/__mocks__/**",  
                                                        wholename: true,  
                                                        include_dot_files: false,  
                                                        no_escape: false,  
                                                    },  
                                                ),  
                                                Match(  
                                                    MatchTerm {  
                                                        glob: "**/__generated__/**",  
                                                        wholename: true,  
                                                        include_dot_files: false,  
                                                        no_escape: false,  
                                                    },  
                                                ),  
                                            ],  
                                        ),  
                                    ),  
                                ],  
                            ),  
                            Name(  
                                NameTerm {  
                                    paths: [  
                                        "schema.graphql",  
                                    ],  
                                    wholename: true,  
                                },  
                            ),  
                        ],  
                    ),  
                ],  
            ),  
        ),  
        fields: [  
            "name",  
            "exists",  
        ],  
        empty_on_fresh_instance: false,  
        omit_changed_files: false,  
        fail_if_no_saved_state: false,  
        case_sensitive: false,  
        sync_timeout: Default,  
        settle_period: None,  
        settle_timeout: None,  
        dedup_results: false,  
        lock_timeout: None,  
        request_id: None,  
        always_include_directories: false,  
    },  
)  
[ERROR] Compilation failed.  
[ERROR] Unable to run relay compiler. Error details:  
Watchman { source: WatchmanServerError { message: "watchman::QueryExecError: query failed: synchronization failed: ", command: "QueryRequest(\n \"query\",\n \"/workspaces/Relay-and-Watchman-Practice-project\",\n QueryRequestCommon {\n glob: None,\n glob_noescape: false,\n glob_includedotfiles: false,\n path: Some(\n [\n RecursivePath(\n \"\",\n ),\n ],\n ),\n suffix: None,\n since: None,\n relative_root: None,\n expression: Some(\n All(\n [\n FileType(\n Regular,\n ),\n Any(\n [\n All(\n [\n All(\n [\n DirName(\n DirNameTerm {\n path: \"src\",\n depth: None,\n },\n ),\n Suffix(\n [\n \"js\",\n \"jsx\",\n ],\n ),\n ],\n ),\n Not(\n Any(\n [\n Match(\n MatchTerm {\n glob: \"**/node_modules/**\",\n wholename: true,\n include_dot_files: false,\n no_escape: false,\n },\n ),\n Match(\n MatchTerm {\n glob: \"**/__mocks__/**\",\n wholename: true,\n include_dot_files: false,\n no_escape: false,\n },\n ),\n Match(\n MatchTerm {\n glob: \"**/__generated__/**\",\n wholename: true,\n include_dot_files: false,\n no_escape: false,\n },\n ),\n ],\n ),\n ),\n ],\n ),\n Name(\n NameTerm {\n paths: [\n \"schema.graphql\",\n ],\n wholename: true,\n },\n ),\n ],\n ),\n ],\n ),\n ),\n fields: [\n \"name\",\n \"exists\",\n ],\n empty_on_fresh_instance: false,\n omit_changed_files: false,\n fail_if_no_saved_state: false,\n case_sensitive: false,\n sync_timeout: Default,\n settle_period: None,\n settle_timeout: None,\n dedup_results: false,\n lock_timeout: None,\n request_id: None,\n always_include_directories: false,\n },\n)" } }  
error Command failed with exit code 1.  
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

 

I tried increasing the file watcher limit with 

echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p but no difference is made

I also tried watchman watch-del-all to no avail. Has anyone had similar issues with Relay and Watchmen on Linux?

I am also wondering if it is related to this issue at all, which I sometimes get:

#3674

[lynnshaoyu]

thanks for alerting, we added a task to fix it internally when we get around to it, but would love to get contributions from OSS if anyone is interested in taking it on