no retry by default because of risk

Author: chernser

clickhouse-http-client/src/main/java/com/clickhouse/client/http/config/ClickHouseHttpOption.java

@@ -80,7 +80,7 @@ public enum ClickHouseHttpOption implements ClickHouseOption {
      *     <li>{@code 503 Service Unavailable}</li>
      * </ul>
      */
-    AHC_RETRY_ON_FAILURE("ahc_retry_on_failure", true, "Whether to retry on failure with AsyncHttpClient.")
+    AHC_RETRY_ON_FAILURE("ahc_retry_on_failure", false, "Whether to retry on failure with AsyncHttpClient.")
     ;
 
     private final String key;

clickhouse-http-client/src/test/java/com/clickhouse/client/http/ApacheHttpConnectionImplTest.java

@@ -133,9 +133,7 @@ public void testFailureWhileRequest() {
                     .willReturn(WireMock.aResponse().withFault(Fault.EMPTY_RESPONSE)).build());
 
             ClickHouseHttpClient httpClient = new ClickHouseHttpClient();
-            Map<ClickHouseOption, Serializable> options = new HashMap<>();
-            options.put(ClickHouseHttpOption.AHC_RETRY_ON_FAILURE, false);
-            ClickHouseConfig config = new ClickHouseConfig(options);
+            ClickHouseConfig config = new ClickHouseConfig();
             httpClient.init(config);
             ClickHouseRequest request = httpClient.read("http://localhost:9090/").query("SELECT 1");
 
@@ -174,7 +172,9 @@ public void testRetryOnFailure() {
                     .build());
 
             ClickHouseHttpClient httpClient = new ClickHouseHttpClient();
-            ClickHouseConfig config = new ClickHouseConfig();
+            Map<ClickHouseOption, Serializable> options = new HashMap<>();
+            options.put(ClickHouseHttpOption.AHC_RETRY_ON_FAILURE, true);
+            ClickHouseConfig config = new ClickHouseConfig(options);
             httpClient.init(config);
             ClickHouseRequest request = httpClient.read("http://localhost:9090/").query("SELECT 1");