Troubleshooting
Diagnosing problems in NATS JetStream clusters requires:
knowledge of JetStream concepts
knowledge of the NATS Command Line Interface (CLI)
The following tips and commands (while not an exhaustive list) can be useful when diagnosing problems in NATS JetStream clusters:
Troubleshooting tips
Look at nats-server logs. By default, only warning and error logs are produced, but debug and trace logs can be turned on from the command line using
-Dand-DV, respectively. Alternatively, enablingdebugortracein the server config.Make sure that in the NATS JetStream configuration, at least one system user is configured in this section:
{ $SYS { users } }.
nats account commands
nats account commandsVerify that JetStream is enabled on account
Basic nats server commands
nats server commandsnats server ls
List known servers
nats server ping
Ping all servers
nats server info
Show information about a single server
Health check for NATS servers
nats server report commands
nats server report commandsnats server report connections
Report on connections
nats server report accounts
Report on account activity
Report on JetStream activity
nats server request commands
nats server request commandsShow JetStream details
nats server request subscriptions
Show subscription information
nats server request variables
Show runtime variables
nats server request connections
Show connection details
nats server request routes
Show route details
nats server request gateways
Show gateway details
nats server request leafnodes
Show leafnode details
nats server request accounts
Show account details
nats server cluster commands
nats server cluster commandsForce a new leader election by standing down the current meta leader
Removes a server from a JetStream cluster
Experimental commands
Monitor NATS traffic. (Experimental command)
Further troubleshooting references
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