[GoogleCloudSpannerReceiver] Spanner database not found

.chloggen/spanner_database_errors.yaml

@@ -0,0 +1,28 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: googlecloudspannerreceiver
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Cloud spanner receiver to not stop if a database is not found.
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [14624]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext: Cloud spanner receiver will not exit if one of the databases is not found. |
+  It will move on to gather stats from other databases in the config list.
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: [user]

receiver/googlecloudspannerreceiver/internal/statsreader/projectreader.go

@@ -38,6 +38,11 @@ func (projectReader *ProjectReader) Read(ctx context.Context) ([]*metadata.Metri
 	for _, databaseReader := range projectReader.databaseReaders {
 		dataPoints, err := databaseReader.Read(ctx)
 		if err != nil {
+			if strings.Contains(err.Error(), "spanner: code = \"NotFound\"") {
+				// Move on to next database if current database is not found.
+				projectReader.logger.Warn("Could not read stats", zap.String("database", databaseReader.Name()), zap.Error(err))
+				continue
+			}
 			return nil, err
 		}
 

receiver/googlecloudspannerreceiver/internal/statsreader/projectreader_test.go

@@ -6,6 +6,7 @@ package statsreader
 import (
 	"context"
 	"errors"
+	"fmt"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -62,10 +63,12 @@ func TestProjectReader_Read(t *testing.T) {
 	ctx := context.Background()
 	logger := zaptest.NewLogger(t)
 	testCases := map[string]struct {
-		expectedError error
+		isErrorExpected bool
+		expectedError   error
 	}{
-		"Happy path":     {nil},
-		"Error occurred": {errors.New("read error")},
+		"Happy path":         {false, nil},
+		"Error occurred":     {true, errors.New("read error")},
+		"Database not found": {false, fmt.Errorf("query failed with error: %w", errors.New("spanner: code = \"NotFound\""))},
 	}
 
 	for name, testCase := range testCases {
@@ -84,7 +87,7 @@ func TestProjectReader_Read(t *testing.T) {
 
 			compositeReader.AssertExpectations(t)
 
-			if testCase.expectedError != nil {
+			if testCase.isErrorExpected {
 				require.Error(t, err)
 			} else {
 				require.NoError(t, err)