chore(spanner): add stack trace (googleapis#3288)

* chore(spanner): add stack trace * chore(spanner): update message

Author: harshachinta

google-cloud-spanner-executor/src/main/java/com/google/cloud/executor/spanner/CloudClientExecutor.java

@@ -75,6 +75,7 @@
 import com.google.cloud.spanner.encryption.CustomerManagedEncryption;
 import com.google.cloud.spanner.v1.stub.SpannerStubSettings;
 import com.google.common.base.Function;
+import com.google.common.base.Joiner;
 import com.google.common.base.Preconditions;
 import com.google.common.collect.Lists;
 import com.google.common.util.concurrent.ThreadFactoryBuilder;
@@ -191,6 +192,16 @@ public CloudClientExecutor(boolean enableGrpcFaultInjector) {
  this.enableGrpcFaultInjector = enableGrpcFaultInjector;
  }
 
+ // Helper for unexpected results.
+ public static String unexpectedExceptionResponse(Exception e) {
+ return "Unexpected error in Github Cloud Java Client Executor: "
+ + e
+ + " Msg: "
+ + e.getMessage()
+ + " Stack: "
+ + Joiner.on("\n").join(e.getStackTrace());
+ }
+
  /**
  * Implementation of a ReadWriteTransaction, which is a wrapper of the cloud TransactionRunner. It
  * stores all the status and related variables from the start to finish, and control the running
@@ -1083,7 +1094,7 @@ private Status executeCreateCloudInstance(
  return sender.finishWithError(
  toStatus(
  SpannerExceptionFactory.newSpannerException(
- ErrorCode.INVALID_ARGUMENT, "Unexpected error: " + e.getMessage())));
+ ErrorCode.INVALID_ARGUMENT, CloudClientExecutor.unexpectedExceptionResponse(e))));
  }
  return sender.finishWithOK();
  }