Fix for #46 (Improve error message) (#51)

added stack trace to error message for easier problem analysis

README.md

@@ -1,6 +1,6 @@
 # Virtual Schemas
 
-[![Build Status](https://travis-ci.org/EXASOL/virtual-schemas.svg?branch=master)](https://travis-ci.org/EXASOL/virtual-schemas)
+[![Build Status](https://travis-ci.org/exasol/virtual-schemas.svg?branch=master)](https://travis-ci.org/exasol/virtual-schemas)
 
 <p style="border: 1px solid black;padding: 10px; background-color: #FFFFCC;"><span style="font-size:200%">&#9888;</span> Please note that this is an open source project which is officially supported by Exasol. For any question, you can contact our support team.</p>
 

jdbc-adapter/README.md

@@ -1,6 +1,6 @@
 # JDBC Adapter for Virtual Schemas
 
-[![Build Status](https://travis-ci.org/EXASOL/virtual-schemas.svg)](https://travis-ci.org/EXASOL/virtual-schemas)
+[![Build Status](https://travis-ci.org/exasol/virtual-schemas.svg)](https://travis-ci.org/exasol/virtual-schemas)
 
 ## Overview
 

jdbc-adapter/virtualschema-jdbc-adapter/src/main/java/com/exasol/adapter/jdbc/JdbcAdapter.java

@@ -67,7 +67,8 @@ public static String adapterCall(final ExaMetadata meta, final String input) thr
         } catch (final AdapterException e) {
             throw e;
         } catch (final Exception e) {
-            throw new Exception("Unexpected error in adapter for following request: " + input + "\nResponse: " + result,
+            String stacktrace = UdfUtils.traceToString(e);
+            throw new Exception("Unexpected error in adapter: " + e.getMessage() + "\nFor following request: " + input + "\nResponse: " + result + "\nAdapter stack trace: " + stacktrace,
                     e);
         }
     }

jdbc-adapter/virtualschema-jdbc-adapter/src/test/java/com/exasol/adapter/dialects/impl/ExasolSqlDialectIT.java

@@ -284,6 +284,15 @@ public void testCase() throws SQLException, FileNotFoundException {
                 "SELECT CASE WHEN 1 < \"A\" THEN 'YES' ELSE 'NO' END FROM \"" + TEST_SCHEMA + "\".\"SIMPLE_VALUES\"", IS_LOCAL);
     }
 
+    @Test
+    public void testErrorMessages() throws SQLException, FileNotFoundException {
+        this.thrown.expect(Exception.class);
+        this.thrown.expectMessage("Could not access the connection information of connection NO_CONNECTION");
+        createVirtualSchema("VS_EXA_IT_BROKEN", ExasolSqlDialect.getPublicName(), "", "NATIVE_EXA_IT", "NO_CONNECTION",
+        "", "", "ADAPTER.JDBC_ADAPTER", "",
+        false, getConfig().debugAddress(), "", null);
+    }
+
     /**
      * This was replaced by integration test {@link #testDataTypeMapping()}. It can
      * be enabled temporarily for debugging.