One more better way if you would like to do using cli is nodetool statusbinary running: if cql port starts up Not running: if the machine is not ready to accept reads and writes
On Monday, January 13, 2020, Erick Ramirez <flightc...@gmail.com> wrote: > Yes, a line like this in the system.log indicates that Cassandra has > started successfully on a node: > > INFO [main] 2019-12-17 03:03:37,526 Server.java:156 - Starting listening >> for CQL clients on /x.x.x.x:9042 (unencrypted)... > > > If you're looking for a simpler way of determining it from the command > line, you can use netstat or lsof to check if the node is listening on > port 9042 (default). Here are sample commands: > > $ sudo lsof -i :9042 >> COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME >> java 18739 ubuntu 83u IPv4 49512 0t0 TCP localhost:9042 >> (LISTEN) > > > $ netstat -ltnp | grep 9042 >> tcp 0 0 127.0.0.1:9042 0.0.0.0:* >> LISTEN 18739/java > > > Obviously, you'll need to adjust it accordingly if you've set the native > transport port to another value. Cheers! > > On Sat, Jan 11, 2020 at 1:40 AM Jean Carlo <jean.jeancar...@gmail.com> > wrote: > >> Hello >> >> Using nodetool status can be slow meanwhile your cluster is bigger. Not >> sure about nodetoo info but I prefer to rely on the message "Starting >> listening for CQL clients". >> >> In my company we use a script that checks the cqlsh command. if it >> succeed then that node is ready and UP. >> >> Concerning to "Starting listening for CQL clients" message, once you get >> it, you will be able to do cqlsh, so both of them are the same >> >> Cheers >> >> Jean Carlo >> >> "The best way to predict the future is to invent it" Alan Kay >> >> >> On Thu, Jan 9, 2020 at 9:14 AM <rhys.campb...@swisscom.com> wrote: >> >>> I've always used the wait_for task on port 9042 for Ansible >>> >>> >>> >>> https://docs.ansible.com/ansible/latest/modules/wait_for_module.html >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> *From:* Voytek Jarnot <voytek.jar...@gmail.com> >>> *Sent:* 08 January 2020 21:37 >>> *To:* user@cassandra.apache.org >>> *Subject:* Log output when Cassandra is "up"? >>> >>> >>> >>> Needing to know when Cassandra is finished initializing and is up & >>> running. >>> >>> >>> >>> Had some scripts which were looking through system.log for "No gossip >>> backlog; proceeding", but that turns out not to be 100% reliable. >>> >>> >>> >>> Is looking for "Starting listening for CQL clients" considered >>> definitive? I.E., always gets output on success, and not on failure? >>> >>> >>> >>> Thanks >>> >>
