Run cassandra with "./bin/cassandra -f", how to return the terminal window?

Question

when using ./bin/cassandra -f it shows:

 Cz@z-EX465-MX :~/cassandra$ ./bin/cassandra -f INFO 09:12:19,460 Logging initialized INFO 09:12:19,484 Heap size: 1033895936/1033895936 INFO 09:12:19,486 JNA not found. Native methods will be disabled. INFO 09:12:19,501 Loading settings from file:/home/z/cassandra/conf/cassandra.yaml INFO 09:12:19,711 DiskAccessMode 'auto' determined to be standard, indexAccessMode is standard INFO 09:12:19,829 Creating new commitlog segment /var/lib/cassandra/commitlog/CommitLog-1297127539829.log INFO 09:12:19,888 Deleted /var/lib/cassandra/data/system/LocationInfo-f-12 INFO 09:12:19,889 Deleted /var/lib/cassandra/data/system/LocationInfo-f-9 INFO 09:12:19,890 Deleted /var/lib/cassandra/data/system/LocationInfo-f-11 INFO 09:12:19,891 Deleted /var/lib/cassandra/data/system/LocationInfo-f-10 INFO 09:12:19,939 reading saved cache /var/lib/cassandra/saved_caches/system-IndexInfo-KeyCache INFO 09:12:19,946 reading saved cache /var/lib/cassandra/saved_caches/system-Schema-KeyCache INFO 09:12:19,949 reading saved cache /var/lib/cassandra/saved_caches/system-Migrations-KeyCache INFO 09:12:19,952 reading saved cache /var/lib/cassandra/saved_caches/system-LocationInfo-KeyCache INFO 09:12:19,962 Opening /var/lib/cassandra/data/system/LocationInfo-f-13 INFO 09:12:19,984 reading saved cache /var/lib/cassandra/saved_caches/system-HintsColumnFamily-KeyCache INFO 09:12:20,043 Couldn't detect any schema definitions in local storage. INFO 09:12:20,045 Found table data in data directories. Consider using JMX to call org.apache.cassandra.service.StorageService.loadSchemaFromYaml(). INFO 09:12:20,058 Replaying /var/lib/cassandra/commitlog/CommitLog-1297127304757.log INFO 09:12:20,060 Finished reading /var/lib/cassandra/commitlog/CommitLog-1297127304757.log INFO 09:12:20,061 Log replay complete INFO 09:12:20,147 Cassandra version: 0.7.1-SNAPSHOT INFO 09:12:20,147 Thrift API version: 19.4.0 INFO 09:12:20,168 Loading persisted ring state INFO 09:12:20,175 Starting up server gossip INFO 09:12:20,195 switching in a fresh Memtable for LocationInfo at CommitLogContext(file='/var/lib/cassandra/commitlog/CommitLog-1297127539829.log', position=89) INFO 09:12:20,197 Enqueuing flush of Memtable-LocationInfo@14850080 (29 bytes, 1 operations) INFO 09:12:20,199 Writing Memtable-LocationInfo@14850080 (29 bytes, 1 operations) INFO 09:12:20,604 Completed flushing /var/lib/cassandra/data/system/LocationInfo-f-14-Data.db (80 bytes) INFO 09:12:20,623 Starting Messaging Service on port 7000 INFO 09:12:20,669 Using saved token 66456586001264063553489133185713650713 INFO 09:12:20,670 switching in a fresh Memtable for LocationInfo at CommitLogContext(file='/var/lib/cassandra/commitlog/CommitLog-1297127539829.log', position=270) INFO 09:12:20,671 Enqueuing flush of Memtable-LocationInfo@5006112 (53 bytes, 2 operations) INFO 09:12:20,671 Writing Memtable-LocationInfo@5006112 (53 bytes, 2 operations) INFO 09:12:20,938 Completed flushing /var/lib/cassandra/data/system/LocationInfo-f-15-Data.db (163 bytes) INFO 09:12:20,945 Will not load MX4J, mx4j-tools.jar is not in the classpath INFO 09:12:21,008 Binding thrift service to localhost/127.0.0.1:9160 INFO 09:12:21,013 Using TFastFramedTransport with a max frame size of 15728640 bytes. INFO 09:12:21,016 Listening for thrift clients... 

so when viewing 127.0.0.1:9160 it shows a blank white page. but I can’t use this terminal window other than pressing Ctrl+c and stop cassandra.

I see if I can use ./bin/cassandra -f & to return to the terminal window, but when I tried pgrep thrift or pgrep cassandra I did not find anything. I do not know how to stop it when using another terminal window.

Answer 1

The -f value for the foreground. Just omit this if you want Cassandra to demonize.

Answer 2

resolved. use pgrep java to see the process

Answer 3

On a * nix system, you can enter ctrl-z to stop the cassandra foreground process. This will give you a hint if you type bg at the command line, the cassandra process will be created. You can do this with any foreground process you need for the background.

Answer 4

if you use the -f combination, then your work is in the background.

you can simply enter:

 fg 

to bring it to the front and then CTRL-C

or use:

 jobs 

to see what you have in the background. then you can use fg with the job number.

You can also use CTRL-Z to pause what is currently running on the terminal, and then use:

 bg 

for the background.

Here is an example session in which I run the tail twice and demonstrate turning it on and off

 rob@deathstar :~$ tail -f /var/log/messages & [1] 13074 <-- that the PID :) rob@deathstar :~$ tail -f /var/log/daemon.log & [2] 13089 rob@deathstar :~$ jobs [1]- Running tail -f /var/log/messages & [2]+ Running tail -f /var/log/daemon.log & rob@deathstar :~$ fg 1 tail -f /var/log/messages ^Z [1]+ Stopped tail -f /var/log/messages rob@deathstar :~$ bg [1]+ tail -f /var/log/messages & rob@deathstar :~$ jobs [1]- Running tail -f /var/log/messages & [2]+ Running tail -f /var/log/daemon.log & rob@deathstar :~$ fg 2 tail -f /var/log/daemon.log ^Z [2]+ Stopped tail -f /var/log/daemon.log rob@deathstar :~$ bg [2]+ tail -f /var/log/daemon.log & rob@deathstar :~$ jobs [1]- Running tail -f /var/log/messages & [2]+ Running tail -f /var/log/daemon.log & rob@deathstar :~$ 

Answer 5

Use

./cassandra -f pid.txt

Your process will automatically start in the background and output the process identifier to a file. It will be useful to stop the cassandra process using the process identifier in the pid.txt file.

Answer 6

In the case of Windows .... you will need to restart the cluster again, as soon as the service is launched in the foreground, the cluster needs to be restarted