Setting Up Error Reporting for Java

You can send error reports to Stackdriver Error Reporting from Java applications by using the Stackdriver Error Reporting package for Java.

Error Reporting is integrated with some Google Cloud services, such as App Engine, Compute Engine, and Google Kubernetes Engine. Error Reporting displays the errors that are logged to Stackdriver Logging by applications running on those services. For more information, go to Running on Google Cloud Platform on this page.

You can also send error data to Error Reporting using Logging. For information on the data formatting requirements, read Formatting error messages in Logging.

Before you begin

  1. Sign in to your Google Account.

    If you don't already have one, sign up for a new account.

  2. In the Cloud Console, on the project selector page, select or create a Google Cloud project.

    Go to the project selector page

  3. Make sure that billing is enabled for your Google Cloud project. Learn how to confirm billing is enabled for your project.

  4. Enable the Error Reporting API .

    Enable the API

Installing the client library

Stackdriver Error Reporting package for Java lets you monitor and view errors reported by Java applications running nearly anywhere.

For more information on installation, read the documentation for the Stackdriver Error Reporting package for Java. You can also report issues using the issue tracker.

Configuring the client library

You can customize the behavior of the Stackdriver Error Reporting package for Java. See the Java API reference documentation.

Reporting errors

Use the Stackdriver Error Reporting package for Java only if you need to report custom error events.

Exceptions logged using the Stackdriver Logback Appender or java.util.logging Stackdriver Handler are automatically reported to the Error Reporting console.

The following sample demonstrates using the API to report a custom error event:


import com.google.cloud.ServiceOptions;
import com.google.cloud.errorreporting.v1beta1.ReportErrorsServiceClient;
import com.google.devtools.clouderrorreporting.v1beta1.ErrorContext;
import com.google.devtools.clouderrorreporting.v1beta1.ProjectName;
import com.google.devtools.clouderrorreporting.v1beta1.ReportedErrorEvent;
import com.google.devtools.clouderrorreporting.v1beta1.SourceLocation;

/**
 * Snippet demonstrates using the Stackdriver Error Reporting API to report a custom error event.
 * <p>
 * This library is not required on App Engine, errors written to stderr are automatically written
 * to Stackdriver Error Reporting.
 * It is also not required if you are writing logs to Stackdriver Logging.
 * Errors written to Stackdriver Logging that contain an exception or stack trace
 * are automatically written out to Stackdriver Error Reporting.
 */
public class QuickStart {
  public static void main(String[] args) throws Exception {

    // Google Cloud Platform Project ID
    String projectId = (args.length > 0) ? args[0] : ServiceOptions.getDefaultProjectId();
    ProjectName projectName = ProjectName.of(projectId);

    // Instantiate an Error Reporting Client
    try (ReportErrorsServiceClient reportErrorsServiceClient = ReportErrorsServiceClient.create()) {

      // Custom error events require an error reporting location as well.
      ErrorContext errorContext = ErrorContext.newBuilder()
          .setReportLocation(SourceLocation.newBuilder()
              .setFilePath("Test.java")
              .setLineNumber(10)
              .setFunctionName("myMethod")
              .build())
          .build();

      //Report a custom error event
      ReportedErrorEvent customErrorEvent = ReportedErrorEvent.getDefaultInstance()
          .toBuilder()
          .setMessage("custom error event")
          .setContext(errorContext)
          .build();
      // Report an event synchronously, use .reportErrorEventCallable for asynchronous reporting.
      reportErrorsServiceClient.reportErrorEvent(projectName, customErrorEvent);
    }
  }
}
See the Java API Reference Documentation on how to retrieve and manage error statistics as well as data for individual events.

Running on Google Cloud

Using the Stackdriver Error Reporting package for Java requires the Cloud Identity and Access Management Error Reporting Writer role. Most Google Cloud computing platforms provide this role by default.

App Engine flexible environment

App Engine grants the Error Reporting Writer role by default.

The Stackdriver Error Reporting package for Java can be used without needing to explicitly provide credentials.

Error Reporting is automatically enabled for App Engine flexible environment applications. No additional setup is required.

@WebServlet(name = "Error reporting", value = "/error")
public class ErrorReportingExample extends HttpServlet {

  private Logger logger = Logger.getLogger(ErrorReportingExample.class.getName());

  @Override
  public void doGet(HttpServletRequest req, HttpServletResponse resp)
      throws IOException, ServletException {

    // errors logged to stderr / Cloud logging with exceptions are automatically reported.
    logger.log(Level.SEVERE, "exception using log framework", new IllegalArgumentException());

    // use the error-reporting client library only if you require logging custom error events.
    logCustomErrorEvent();

    // runtime exceptions are also automatically reported.
    throw new RuntimeException("this is a runtime exception");
  }

  private void logCustomErrorEvent() {
    try (ReportErrorsServiceClient reportErrorsServiceClient = ReportErrorsServiceClient.create()) {
      // Custom error events require an error reporting location as well.
      ErrorContext errorContext = ErrorContext.newBuilder()
          .setReportLocation(SourceLocation.newBuilder()
              .setFilePath("Test.java")
              .setLineNumber(10)
              .setFunctionName("myMethod")
              .build())
          .build();
      //Report a custom error event
      ReportedErrorEvent customErrorEvent = ReportedErrorEvent.getDefaultInstance()
          .toBuilder()
          .setMessage("custom error event")
          .setContext(errorContext)
          .build();

      // default project id
      ProjectName projectName = ProjectName.of(ServiceOptions.getDefaultProjectId());
      reportErrorsServiceClient.reportErrorEvent(projectName, customErrorEvent);
    } catch (Exception e) {
      logger.log(Level.SEVERE, "Exception encountered logging custom event", e);
    }
  }
}

Google Kubernetes Engine

On GKE, you must add the cloud-platform access scope when creating the cluster, as the following example command shows:

gcloud container clusters create example-cluster-name --scopes https://www.googleapis.com/auth/cloud-platform

Compute Engine

When using Compute Engine VM instances, add the cloud-platform access scope to each instance. When creating a new instance through the Google Cloud Console, you can do this in the Identity and API access section of the Create Instance panel. Use the Compute Engine default service account or another service account of your choice, and select Allow full access to all Cloud APIs in the Identity and API access section. Whichever service account you select, ensure that it has been granted the Error Reporting Writer role in the IAM & admin section of the Cloud Console.

Running locally and elsewhere

To use the Stackdriver Error Reporting package for Java outside of Google Cloud, including running the library on your own workstation, on your data center's computers, or on the VM instances of another cloud provider, you must supply your Google Cloud project ID and appropriate service account credentials directly to the Stackdriver Error Reporting package for Java.

You can create and obtain service account credentials manually. When specifying the Role field, use the Error Reporting Writer role. For more information on Cloud Identity and Access Management roles, go to Access control guide.

Viewing error reports

After deployment, you can view error reports in the Cloud Console Error Reporting dashboard.

Go to the Error Reporting dashboard

For more information, see Viewing Errors.

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