Add error message to spanner failure logging

Author: itsankit-google

pom.xml

@@ -20,7 +20,7 @@
 
   <groupId>io.cdap.plugin</groupId>
   <artifactId>google-cloud</artifactId>
-  <version>0.22.7</version>
+  <version>0.22.8-SNAPSHOT</version>
   <name>Google Cloud Plugins</name>
   <packaging>jar</packaging>
   <description>Plugins for Google Big Query</description>

src/main/java/io/cdap/plugin/gcp/spanner/source/SpannerSource.java

@@ -129,9 +129,11 @@ public void configurePipeline(PipelineConfigurer pipelineConfigurer) {
     } catch (SpannerException e) {
       // this is because spanner exception error message is not very user friendly. It contains class names and new
       // lines in the error message.
-      collector.addFailure("Unable to connect to spanner instance.",
-                           "Verify spanner configurations such as instance, database, table, project, etc.")
-        .withStacktrace(e.getStackTrace());
+      collector.addFailure(String.format(
+                  "Unable to connect to spanner instance with error code: %s and error message: %s",
+                  e.getErrorCode().name(), e.getMessage()),
+              "Verify spanner configurations such as instance, database, table, project, etc.")
+          .withStacktrace(e.getStackTrace());
     }
   }