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Jan Tattermusch 6 years ago committed by GitHub
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  1. 15
      TROUBLESHOOTING.md

15
TROUBLESHOOTING.md
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@ -10,12 +10,12 @@ that gets printed to stderr.
## GRPC_VERBOSITY ## GRPC_VERBOSITY
`GRPC_VERBOSITY` is used to set the minimum level of log messages printed by gRPC (supported values are `DEBUG`, `INFO` and `ERROR`). `GRPC_VERBOSITY` is used to set the minimum level of log messages printed by gRPC (supported values are `DEBUG`, `INFO` and `ERROR`). If this environment variable is unset, only `ERROR` logs will be printed.
## GRPC_TRACE ## GRPC_TRACE
`GRPC_TRACE` can be used to enable extra logging for some internal gRPC components. Enabling the right traces can be invaluable `GRPC_TRACE` can be used to enable extra logging for some internal gRPC components. Enabling the right traces can be invaluable
for diagnosing for what is going wrong when things aren't working as intended. Possible values for GRPC_TRACE are listed in [Environment Variables Overview](doc/environment_variables.md). for diagnosing for what is going wrong when things aren't working as intended. Possible values for `GRPC_TRACE` are listed in [Environment Variables Overview](doc/environment_variables.md).
Multiple traces can be enable at once (use comma as separator). Multiple traces can be enable at once (use comma as separator).
``` ```
@ -24,10 +24,11 @@ GRPC_VERBOSITY=debug ./helloworld_application_using_grpc
``` ```
``` ```
# Print info about invocations of low-level C core API. # Print information about invocations of low-level C core API.
# Note that trace logs of log level DEBUG won't be displayed # Note that trace logs of log level DEBUG won't be displayed.
# as GRPC_VERBOSITY and GRPC_TRACE are 2 independent settings. # Also note that most tracers user log level INFO, so without setting
GRPC_TRACE=api ./helloworld_application_using_grpc # GPRC_VERBOSITY accordingly, no traces will be printed.
GRPC_VERBOSITY=info GRPC_TRACE=api ./helloworld_application_using_grpc
``` ```
``` ```
@ -37,6 +38,6 @@ GRPC_VERBOSITY=debug GRPC_TRACE=tcp,http,api ./helloworld_application_using_grpc
Known limitations: `GPRC_TRACE=tcp` is currently not implemented for Windows (you won't see any tcp traces). Known limitations: `GPRC_TRACE=tcp` is currently not implemented for Windows (you won't see any tcp traces).
Please note that the GRPC_TRACE environment variable has nothing to do with gRPC's "tracing" feature (= tracing RPCs in Please note that the `GRPC_TRACE` environment variable has nothing to do with gRPC's "tracing" feature (= tracing RPCs in
microservice environment to gain insight about how requests are processed by deployment), it is merely used to enable printing microservice environment to gain insight about how requests are processed by deployment), it is merely used to enable printing
of extra logs. of extra logs.

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