fcdebug
Dynamically sets the log level to debug a library.
You can modify the core-site.xml file to set the log level of all modules
using the fs.mapr.trace property. However, you must restart FUSE for the
change to take effect. As an alternative, you can use the fcdebug utility
to debug a specific library (at runtime) without restarting FUSE.
NOTE
You may have to run this command once per library (to debug).Syntax
/opt/mapr/server/tools/fcdebug [-i] [-p <process ID>] [-s <shm ID>][-m <module>] [-l <level>] [-o <slowOpsTraceThreshold>]Parameters
| Parameter | Description |
|---|---|
-i |
Lists the current debug level of all modules. |
-l |
Specifies the log level. Value can be one of the following: FATAL, ERROR, WARN,
INFO, DEBUG. NOTE If you do not specify the log level, the default level is applied
for the module. |
-m |
Specifies the module for which the log level is to be set. You can retrieve the
list of modules with the fcdebug -i -p <process ID> or the
fcdebug -i -s <shmid> command. NOTE If you do not specify
the module, the log level is set on all modules. |
-o |
For RPCs, we use the -o parameter to rate limit error
messages.Default value: 0 milliseconds (no error messages are printed) Value ofx milliseconds indicates that error messages are printed every
x milliseconds. There is no limit to the maximum value. |
-p |
Specifies the process ID of either the file client, or the FUSE-based POSIX client. |
-s |
Specifies the shared memory ID (shmid) of either the file client, or the FUSE-based POSIX client. |
ATTENTION
Specify either the process ID (-p) or the
shmid (-s) option. If you specify both the options, only the
shmid (-s) option is used.Examples
The following command retrieves the list of modules:
Note: Use either the -p or the -s option.
/opt/mapr/server/tools/fcdebug -i -p 196614 (OR)
/opt/mapr/server/tools/fcdebug -i -s 335020032NOTE
You
can run this command after dynamically setting the log level to verify the
setting.The following command dynamically sets the log level to DEBUG on the given module:
Note: Use either the -p or the -s option.
/opt/mapr/server/tools/fcdebug -p 196614 -m FuseOps -l DEBUG (OR)
/opt/mapr/server/tools/fcdebug -s 335020032 -m FuseOps -l DEBUGNOTE
It
may take up to30 seconds for the changes to take effect.The following command sets the log level to DEBUG on all the modules:
Note: Use either the -p or the -s option.
/opt/mapr/server/tools/fcdebug -p 196614 -l DEBUG (OR)
/opt/mapr/server/tools/fcdebug -s 335020032 -l DEBUGThe following command resets the log level to the default value on all the modules:
Note: Use either the -p or the -s option.
/opt/mapr/server/tools/fcdebug -p 196614 (OR)
/opt/mapr/server/tools/fcdebug -s 335020032