TFA-00002 : Oracle Trace File Analyzer (TFA) is not running

When I tried to view oratop on database server appears below error:

tfactl oratop -database testdb
TFA-00002 Oracle Trace File Analyzer (TFA) is not running

Solution : As a root user

/etc/init.d/init.tfa  start  
Starting TFA..
start: Job is already running: oracle-tfa
Waiting up to 100 seconds for TFA to be started..
. . . . .
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Successfully started TFA Process..
. . . . .
TFA-00002 : Oracle Trace File Analyzer (TFA) is not running
TFA Failed to start listening for commands

If it is not started successfully than check below : 

run synctfanodes.sh if you have root password . 

if no root password copy below files to TFA Failed node and try to restart TFA .. Please check whether these 4 files exist on all nodes are similar.

TFA_HOME/server.jks 

TFA_HOME/client.jks 

TFA_HOME/internal/ssl.properties 

TFA_HOME/internal/ 

portmapping.txt If not similar just copy these files to TFA Failing node and try TFA Restart ..It Worked for me .

 
./tfactl  -v "debug" start
Starting TFA..
start: Job is already running: oracle-tfa
Waiting up to 100 seconds for TFA to be started..
. . . . .
. . . . .
. . . . .
. . . . .
. . . . .
. . . . .
. . . . .
. . . . .
Successfully started TFA Process..
. . . . .
TFA Started and listening for commands

tfactl print status

.------------------------------------------------------------------------------------------------.
| Host    | Status of TFA | PID    | Port | Version    | Build ID             | Inventory Status |
+---------+---------------+--------+------+------------+----------------------+------------------+
| x82db01 | RUNNING       | 272939 | 5000 | 21.2.1.0.0 | 21210020210813042249 | COMPLETE         |
'---------+---------------+--------+------+------------+----------------------+------------------'

After that we can use oratop and monitor database with : tfactl oratop -database testdb