GG-14565 Can't connect to cluster by JDBC with cache read-only permis…

…sions.

modules/core/src/main/java/org/apache/ignite/internal/jdbc/JdbcConnection.java

@@ -64,8 +64,12 @@
  */
 @Deprecated
 public class JdbcConnection implements Connection {
-    /** Validation task name. */
-    private static final String VALID_TASK_NAME =
+    /** Connection validation task name. */
+    private static final String CONNECTION_VALID_TASK_NAME =
+        "org.apache.ignite.internal.jdbc.JdbcConnectionValidationTask";
+
+    /** Cache validation task name. */
+    private static final String CACHE_VALID_TASK_NAME =
         "org.apache.ignite.internal.processors.cache.query.jdbc.GridCacheQueryJdbcValidationTask";
 
     /** Ignite client. */
@@ -86,6 +90,9 @@ public class JdbcConnection implements Connection {
     /** Timeout. */
     private int timeout;
 
+    /** Whether using security. */
+    private boolean usingSecurity;
+
     /**
      * Creates new connection.
      *
@@ -114,10 +121,14 @@ public JdbcConnection(String url, Properties props) throws SQLException {
             String passwd = props.getProperty("password");
 
             if (!F.isEmpty(user)) {
+                usingSecurity = true;
+
                 SecurityCredentials creds = new SecurityCredentials(user, passwd);
 
                 cfg.setSecurityCredentialsProvider(new SecurityCredentialsBasicProvider(creds));
             }
+            else
+                usingSecurity = false;
 
             // Disable all fetching and caching for metadata.
             cfg.setEnableMetricsCache(false);
@@ -452,7 +463,9 @@ public JdbcConnection(String url, Properties props) throws SQLException {
             throw new SQLException("Invalid timeout: " + timeout);
 
         try {
-            return client.compute().<Boolean>executeAsync(VALID_TASK_NAME, cacheName).get(timeout, SECONDS);
+            return client.compute()
+                .<Boolean>executeAsync(usingSecurity ? CONNECTION_VALID_TASK_NAME : CACHE_VALID_TASK_NAME, cacheName)
+                .get(timeout, SECONDS);
         }
         catch (GridClientDisconnectedException | GridClientFutureTimeoutException e) {
             throw new SQLException("Failed to establish connection.", e);

modules/core/src/main/java/org/apache/ignite/internal/jdbc/JdbcConnectionValidationTask.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright 2019 GridGain Systems, Inc. and Contributors.
+ *
+ * Licensed under the GridGain Community Edition License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.gridgain.com/products/software/community-edition/gridgain-community-edition-license
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.ignite.internal.jdbc;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import org.apache.ignite.IgniteException;
+import org.apache.ignite.compute.ComputeJob;
+import org.apache.ignite.compute.ComputeJobAdapter;
+import org.apache.ignite.compute.ComputeJobResult;
+import org.apache.ignite.compute.ComputeTaskSplitAdapter;
+import org.apache.ignite.internal.util.typedef.F;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * This task is used for JDBCConnection validation.
+ *
+ * @deprecated Using Ignite client node based JDBC driver is preferable.
+ * See documentation of {@link org.apache.ignite.IgniteJdbcDriver} for details.
+ */
+@Deprecated
+public class JdbcConnectionValidationTask extends ComputeTaskSplitAdapter<Object, Boolean> {
+    /** */
+    private static final long serialVersionUID = 0L;
+
+    /** {@inheritDoc} */
+    @Override protected Collection<? extends ComputeJob> split(int gridSize, Object arg) throws IgniteException {
+        return Collections.singletonList(new ComputeJobAdapter() {
+            @Override public Object execute() throws IgniteException {
+                return true;
+            }
+        });
+    }
+
+    /** {@inheritDoc} */
+    @Nullable @Override public Boolean reduce(List<ComputeJobResult> results) throws IgniteException {
+        return F.first(results).getData();
+    }
+}