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 theEndpointOption(which defaults to "
GOOGLE_CLOUD_CPP_BATCH_CONTROLLER_ENDPOINT=...overrides theEndpointOption(which defaults to "
GOOGLE_CLOUD_CPP_CLUSTER_CONTROLLER_ENDPOINT=...overrides theEndpointOption(which defaults to "
GOOGLE_CLOUD_CPP_JOB_CONTROLLER_ENDPOINT=...overrides theEndpointOption(which defaults to "
GOOGLE_CLOUD_CPP_WORKFLOW_TEMPLATE_SERVICE_ENDPOINT=...overrides theEndpointOption(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 setGOOGLE_CLOUD_CPP_ENABLE_CLOGto 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 2025-09-04 UTC."],[[["\u003cp\u003eThis document provides version-specific documentation for the Dataproc C++ client library, with the latest release being version 2.37.0-rc.\u003c/p\u003e\n"],["\u003cp\u003eThe behavior of the library can be customized using several environment variables, which are particularly useful for troubleshooting purposes.\u003c/p\u003e\n"],["\u003cp\u003eEndpoint overrides for various Dataproc services, such as Autoscailing Policy, Batch Controller, Cluster Controller, Job Controller, and Workflow Template, can be set using environment variables like \u003ccode\u003eGOOGLE_CLOUD_CPP_AUTOSCALING_POLICY_SERVICE_ENDPOINT\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eTracing and logging capabilities can be enabled and configured via environment variables such as \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_TRACING\u003c/code\u003e and \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_CLOG\u003c/code\u003e, allowing for detailed monitoring of gRPC calls and library activity.\u003c/p\u003e\n"],["\u003cp\u003eWhile the \u003ccode\u003eGOOGLE_CLOUD_PROJECT\u003c/code\u003e environment variable is used in examples and integration tests, it does not directly impact the library's functionality.\u003c/p\u003e\n"]]],[],null,["Version 2.12.0keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/dataproc/latest/dataproc-env)\n- [2.41.0](/cpp/docs/reference/dataproc/2.41.0/dataproc-env)\n- [2.40.0](/cpp/docs/reference/dataproc/2.40.0/dataproc-env)\n- [2.39.0](/cpp/docs/reference/dataproc/2.39.0/dataproc-env)\n- [2.38.0](/cpp/docs/reference/dataproc/2.38.0/dataproc-env)\n- [2.37.0](/cpp/docs/reference/dataproc/2.37.0/dataproc-env)\n- [2.36.0](/cpp/docs/reference/dataproc/2.36.0/dataproc-env)\n- [2.35.0](/cpp/docs/reference/dataproc/2.35.0/dataproc-env)\n- [2.34.0](/cpp/docs/reference/dataproc/2.34.0/dataproc-env)\n- [2.33.0](/cpp/docs/reference/dataproc/2.33.0/dataproc-env)\n- [2.32.0](/cpp/docs/reference/dataproc/2.32.0/dataproc-env)\n- [2.31.0](/cpp/docs/reference/dataproc/2.31.0/dataproc-env)\n- [2.30.0](/cpp/docs/reference/dataproc/2.30.0/dataproc-env)\n- [2.29.0](/cpp/docs/reference/dataproc/2.29.0/dataproc-env)\n- [2.28.0](/cpp/docs/reference/dataproc/2.28.0/dataproc-env)\n- [2.27.0](/cpp/docs/reference/dataproc/2.27.0/dataproc-env)\n- [2.26.0](/cpp/docs/reference/dataproc/2.26.0/dataproc-env)\n- [2.25.1](/cpp/docs/reference/dataproc/2.25.1/dataproc-env)\n- [2.24.0](/cpp/docs/reference/dataproc/2.24.0/dataproc-env)\n- [2.23.0](/cpp/docs/reference/dataproc/2.23.0/dataproc-env)\n- [2.22.1](/cpp/docs/reference/dataproc/2.22.1/dataproc-env)\n- [2.21.0](/cpp/docs/reference/dataproc/2.21.0/dataproc-env)\n- [2.20.0](/cpp/docs/reference/dataproc/2.20.0/dataproc-env)\n- [2.19.0](/cpp/docs/reference/dataproc/2.19.0/dataproc-env)\n- [2.18.0](/cpp/docs/reference/dataproc/2.18.0/dataproc-env)\n- [2.17.0](/cpp/docs/reference/dataproc/2.17.0/dataproc-env)\n- [2.16.0](/cpp/docs/reference/dataproc/2.16.0/dataproc-env)\n- [2.15.1](/cpp/docs/reference/dataproc/2.15.1/dataproc-env)\n- [2.14.0](/cpp/docs/reference/dataproc/2.14.0/dataproc-env)\n- [2.13.0](/cpp/docs/reference/dataproc/2.13.0/dataproc-env)\n- [2.12.0](/cpp/docs/reference/dataproc/2.12.0/dataproc-env)\n- [2.11.0](/cpp/docs/reference/dataproc/2.11.0/dataproc-env) \n\nEnvironment Variables\n=====================\n\nA 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.\n\nEndpoint Overrides\n------------------\n\n- `GOOGLE_CLOUD_CPP_AUTOSCALING_POLICY_SERVICE_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"\n- `GOOGLE_CLOUD_CPP_BATCH_CONTROLLER_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"\n- `GOOGLE_CLOUD_CPP_CLUSTER_CONTROLLER_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"\n- `GOOGLE_CLOUD_CPP_JOB_CONTROLLER_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"\n- `GOOGLE_CLOUD_CPP_WORKFLOW_TEMPLATE_SERVICE_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"\n\n###### See Also\n\n[`google::cloud::EndpointOption`](https://cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1EndpointOption.html)\n\nLogging\n-------\n\n`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.\n\n###### See Also\n\n[`google::cloud::TracingComponentsOption`](https://cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1TracingComponentsOption.html)`GOOGLE_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.\n\n###### See Also\n\n[`google::cloud::GrpcTracingOptionsOption`](https://cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1GrpcTracingOptionsOption.html)`GOOGLE_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.\n\n###### See Also\n\n[`google::cloud::LogBackend`](https://cloud.google.com/cpp/docs/reference/common/latest/classgoogle_1_1cloud_1_1LogBackend.html)\n\n###### See Also\n\n[`google::cloud::LogSink`](https://cloud.google.com/cpp/docs/reference/common/latest/classgoogle_1_1cloud_1_1LogSink.html)\n\nSetting the Default Project\n---------------------------\n\n`GOOGLE_CLOUD_PROJECT=...`: is used in examples and integration tests to configure the GCP project. This has no effect in the library."]]
