Freeze one node, module and action
Record the request target, asterisk_id, entity ID, running Asterisk version, startup and last-reload times, exact case-sensitive module name, requested method, HTTP status, response time, caller identity, change record and bounded server logs. Redact credentials while retaining correlation.
Classify the symptom before changing anything: the module is absent from the list, exact GET returns 404, GET returns 409, load returns 409, reload returns 404 or 409, unload returns 404 or 409, the action is accepted but the module state is unexpected, or the module appears healthy while its supplied function still fails.
Prove that ARI reached the intended instance
Use /asterisk/ping and /asterisk/info to compare Asterisk ID, entity ID, version, configuration directories and lifecycle times with the planned node. In a pool, repeat that identification on every relevant target rather than assuming a shared URL means shared runtime state.
If identity is wrong or unstable, correct load-balancer, service-discovery, proxy or client targeting before altering modules. A different cluster member can validly have a different startup time, package revision or module inventory; changing that node will not repair the one handling the failing call.
Interpret the read boundary before mutating
Compare the full module list with the exact module read. Preserve the returned name, description, use count, status and support level. A 404 says the requested name was not found among running modules. A 409 says module information could not be retrieved. Verify case and encoding, then inspect the same host's CLI and bounded logs before concluding that the binary is absent.
If the module is listed but the function fails, follow the function's own configuration and runtime evidence. Do not unload and reload a present module merely because an endpoint, application, codec or resource is misconfigured.
Reconcile binary, dependencies and loader policy
On the identified host, compare the installed package or build manifest, module directory, file permissions, required shared libraries, module-specific dependencies and effective modules.conf. Check whether autoload, load, noload, preload, require or preload-require explains the current state. Preserve the exact package and configuration revisions.
If load returns 409, use the server log at that timestamp to distinguish a missing binary, unresolved dependency, duplicate or conflicting resource, invalid configuration or initialization failure. Do not respond by loosening file permissions broadly, copying a module from another branch or repeatedly retrying the request.
Diagnose reload and unload as different failures
For reload, prove the module is running, supports reload, and has valid effective configuration. A 404 means it was not found in running modules; a 409 means it could not be reloaded. Compare pre-change configuration, validation output, the timestamped log and the module's function before escalating to a service restart.
For unload, identify dependants, active use and service effect. A 409 is a safety boundary, not permission to force the operation elsewhere. The Asterisk CLI guide warns that forced unload modes can cause a crash; preserve the refusal and choose a controlled maintenance path with an explicit rollback if lifecycle replacement is actually required.
Correct one owner and retest persistence
Correct only the proven owner: request target, module name, package or build selection, dependency, file permission, loader policy, module configuration, conflicting resource, supported reload boundary or application function. Avoid changing loader policy, package set and service state together because that erases the fault boundary.
Retest ping and instance identity, exact module read, one approved action, full inventory, bounded logs and the module's specific function. If persistence matters, verify it only across the planned reload or restart under the site's change policy and confirm neighboring services. Restore temporary diagnostics and record rollback. No host, module action, restart or call was inspected or tested for this guide.
Sources & applicability
Primary references for the technical details above. Operational examples and planning checklists are VoIP.info editorial guidance.
- Asterisk 23 ARI Asterisk REST API ↗
- Asterisk 23 ARI REST data models ↗
- Asterisk module-loader configuration and CLI controls ↗
- Asterisk configuration for ARI ↗
Examples require adaptation to your topology. No live PBX or hardware testing is claimed.