AnQiCMS (AnQiCMS) is an efficient and stable content management system, whose design of the startup mechanism is aimed at ensuring the continuous operation of the service. Regarding the question you raised aboutstart.shThe question of whether the script will repeatedly try to start infinitely when the configuration error causes the start to fail, and my answer is: it will not try to start 'infinitely', but will repeatedly try to start within the set time intervals until the service runs successfully or manual intervention occurs.
Understandingstart.shThe working principle of the script
In the deployment guide of AnQiCMS,start.shThe script is designed to manage the startup of the AnQiCMS application.This script is usually combined with the Linux system's cron job scheduling to achieve automatic startup and process supervision of the application.
start.shThe core logic of the script can be summarized into the following steps:
It first checks if there is a system namedanqicmsprocess. This check is performed byps -ef | grep '\<anqicms\>' |grep -v grep |wc -lsuch commands, which count the number of processes currently runninganqicms.
If the check result showsanqicmsthat the process does not exist (i.e.,exists -eq 0），script will assume that the application is not running.
In this case, the script will execute.cd $BINPATH && nohup $BINPATH/$BINNAME >> $BINPATH/running.log 2>&1 &Command. This command is used to switch to the installation directory of the application, and then start in background mode.nohup ... &) StartanqicmsExecutable file. Any standard output and standard error generated during the startup process will be redirected to$BINPATH/running.logthe file.
Cases where configuration errors lead to startup failure.
When the AnQiCMS configuration file (usually config.jsonAn error exists within the brackets, such as incorrect database connection information, the specified port is occupied, or other key configuration items do not meet the requirements.anqicmsThe executable file encounters problems immediately when attempting to start.
The application will attempt to read configuration files, connect to the database, listen on specified ports, and so on during startup. If these operations fail due to configuration errors,anqicmsThe process will not initialize normally and will run continuously. It will exit quickly and will not leave a long-running process.
start.shRepetitive attempt behavior of the script
Due tostart.shScripts are typically configured to run once every minute (or another specified time interval) through a cron job, when AnQiCMS fails to start due to configuration errors, each time the cron job runs,start.shAll will execute the above check logic.
Each check will findanqicmsThe process does not exist, sostart.shit will try to start again.This means that if the configuration error is not resolved, AnQiCMS will try to start once every minute (or the cron interval you set).
This behavior can be described as a 'repeated attempt' to start, rather than the application itself entering a 'permanent loop' or 'infinite retry' state.Each attempt is an independent start-up process, which will fail and exit due to the same configuration error.running.logCorresponding error information is left in the file.
Impact and solution
Although this repeated attempt will not cause the system to crash, it will bring some impact:
- Log file expansion:
running.logThe file will grow rapidly due to each failed startup attempt, recording a large amount of error information. - Resource consumptionEach startup attempt briefly consumes CPU and memory resources, and if the system resources are tight, it may affect other services.
- Service is unavailableWebsite will always be inaccessible.
To solve this problem, website administrators need to:
- Check
running.logFile: This is the key to the failure of diagnosis startup. The log file will record in detail.anqicmsAn error encountered during the startup process of the application, such as database connection failure, port binding failure, etc. - Correct configuration errors: Locate and modify based on the error information in the logs
config.jsonFile or related configuration. - Manual verificationAfter correcting the configuration, you can manually execute once.
start.shScript, and checkanqicmsWhether the process runs successfully.
Through this mechanism,start.shThe script provides a simple process monitoring capability for AnQiCMS. Although it may repeatedly try when encountering configuration errors, this behavior is controllable and traceable, which is convenient for operators to troubleshoot faults.
Common Questions and Answers (FAQ)
How can I determine if the AnQiCMS application is running?
You can log in to your server and executeps -ef | grep '\<anqicms\>' | grep -v grepCommand. If the command returns one or more lines of results, it indicates that the AnQiCMS process is running. If there is no output, it means that the application is not running.
2. If AnQiCMS fails to start, where should I check for error information?
When AnQiCMS fails to start, its error messages are usually redirected torunning.logIn the file. You can find this file in the AnQiCMS installation directory (for example/www/wwwroot/anqicms/running.log)。Usetail -f running.logcommand to view log updates in real time, which helps you diagnose issues.
What common configuration errors can cause AnQiCMS to fail to start?
Common configuration errors include but are not limited to:
- Incorrect database connection information:
config.jsonThe database address, port, username, or password configured is incorrect, causing the inability to connect to the MySQL database. - Port conflictAnQiCMS configuration port (default is 8001) has been occupied by another application on the server.
- File permission issue【en】：AnQiCMS executable file or related data directory does not have the correct read and write permissions, resulting in the inability to start or create necessary files.
config.json【en】：File format errorThe JSON format is incorrect (e.g., missing commas, mismatched quotes, etc.), causing AnQiCMS to be unable to parse the configuration.