A number of environment variables can be used to configure the behavior of the library. There are also functions to configure this behavior in code. The environment variables are convenient when troubleshooting problems.
Endpoint Overrides
GOOGLE_CLOUD_CPP_AUTOSCALING_POLICY_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "
GOOGLE_CLOUD_CPP_BATCH_CONTROLLER_ENDPOINT=... overrides the EndpointOption (which defaults to "
GOOGLE_CLOUD_CPP_CLUSTER_CONTROLLER_ENDPOINT=... overrides the EndpointOption (which defaults to "
GOOGLE_CLOUD_CPP_JOB_CONTROLLER_ENDPOINT=... overrides the EndpointOption (which defaults to "
GOOGLE_CLOUD_CPP_WORKFLOW_TEMPLATE_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "
GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc: turns on tracing for most gRPC calls. The library injects an additional Stub decorator that prints each gRPC request and response. Unless you have configured your own logging backend, you should also set GOOGLE_CLOUD_CPP_ENABLE_CLOG to produce any output on the program's console.
See Also
google::cloud::TracingComponentsOptionGOOGLE_CLOUD_CPP_TRACING_OPTIONS=...: modifies the behavior of gRPC tracing, including whether messages will be output on multiple lines, or whether string/bytes fields will be truncated.
See Also
google::cloud::GrpcTracingOptionsOptionGOOGLE_CLOUD_CPP_ENABLE_CLOG=yes: turns on logging in the library, basically the library always "logs" but the logging infrastructure has no backend to actually print anything until the application sets a backend or they set this environment variable.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-03-05 UTC."],[[["This document provides version-specific documentation for the Google Cloud Dataproc C++ library, with the latest release candidate being version 2.37.0-rc, and other previous versions listed down to 2.11.0."],["The content focuses on the library's environment variables, which can be utilized for configuration and troubleshooting, including endpoint overrides and logging options."],["Endpoint overrides allow users to specify custom endpoints for various Dataproc services, such as Autoscaling Policy, Batch Controller, Cluster Controller, Job Controller, and Workflow Template Service."],["Logging can be enabled and customized using variables like `GOOGLE_CLOUD_CPP_ENABLE_TRACING`, `GOOGLE_CLOUD_CPP_TRACING_OPTIONS`, and `GOOGLE_CLOUD_CPP_ENABLE_CLOG` to trace gRPC calls and control logging behavior."],["The variable `GOOGLE_CLOUD_PROJECT` can be set for usage in examples and integration tests, but does not affect library behavior."]]],[]]
