{"record":{"id":"e893a811ca74dd20","repo":"MuntashirAkon/AppManager","slug":"error-fork-failed-s-n","errorCode":null,"errorMessage":"Error! Fork failed: %s\\n","messagePattern":"Error! Fork failed: (.+?)\\\\n","errorType":"console","errorClass":null,"httpStatus":null,"severity":"error","filePath":"app/src/main/cpp/run_server.c","lineNumber":235,"sourceCode":"    snprintf(nice_name_buf, sizeof(nice_name_buf), \"--nice-name=%s\", SERVER_NAME);\n    exec_argv[2] = nice_name_buf;\n\n    exec_argv[3] = JAR_MAIN_CLASS;\n    exec_argv[4] = args_buf;\n\n    for (int i = 0; i < extra_args_count; i++) {\n        exec_argv[5 + i] = argv[8 + i];\n    }\n    exec_argv[exec_argc - 1] = NULL;\n\n    printf(\"Local server has started.\\n\");\n    fflush(stdout);\n\n    // Start in the background\n    pid_t pid = fork();\n\n    if (pid < 0) {\n        fprintf(stderr, \"Error! Fork failed: %s\\n\", strerror(errno));\n        unlink(exec_jar_path);\n        free(exec_argv);\n        return 1;\n    }\n\n    if (pid > 0) {\n        // Parent process exits successfully\n        printf(\"Local server started successfully (PID: %d).\\n\", pid);\n        free(exec_argv);\n        return 0;\n    }\n\n    // Detach the background process\n    if (setsid() < 0) {\n        unlink(exec_jar_path);\n        exit(1);\n    }\n","sourceCodeStart":217,"sourceCodeEnd":253,"githubUrl":"https://github.com/MuntashirAkon/AppManager/blob/0152f468fc9463ee02dc2ca83f6fe4989a2c4ca5/app/src/main/cpp/run_server.c#L217-L253","documentation":"fork() returned a negative pid in main() when trying to background the local server. The fork itself failed — the child process was never created — typically due to hitting the process count limit (EAGAIN) or lack of memory (ENOMEM). The parent unlinks the copied jars, frees exec_argv, and returns failure.","triggerScenarios":"Thrown at app/src/main/cpp/run_server.c:235 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Retry the fork after transient resource exhaustion (EAGAIN)","Check and raise RLIMIT_NPROC / process limits on the device","Free or close unused descriptors and memory before forking to reduce ENOMEM risk"],"exampleFix":null,"handlingStrategy":"retry","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"0152f468fc9463ee02dc2ca83f6fe4989a2c4ca5","analyzedAt":"2026-09-12T14:03:37.243Z","contentChangedAt":"2026-09-12T14:03:37.243Z","schemaVersion":2},"datasetVersion":"2026-09-23T08:17:48.524Z"}