Increase MongoClientOptions.minHeartbeatFrequency default from 10 to 500 ms

 JAVA-1633

Author: jyemin

src/main/com/mongodb/MongoClientOptions.java

@@ -58,7 +58,7 @@ public static class Builder {
         private boolean cursorFinalizerEnabled = true;
         private boolean alwaysUseMBeans = false;
         private int heartbeatFrequency = Integer.parseInt(System.getProperty("com.mongodb.updaterIntervalMS", "5000"));
-        private int minHeartbeatFrequency = Integer.parseInt(System.getProperty("com.mongodb.updaterIntervalNoMasterMS", "10"));
+        private int minHeartbeatFrequency = Integer.parseInt(System.getProperty("com.mongodb.updaterIntervalNoMasterMS", "500"));
         private int heartbeatConnectTimeout = Integer.parseInt(System.getProperty("com.mongodb.updaterConnectTimeoutMS", "20000"));
         private int heartbeatSocketTimeout = Integer.parseInt(System.getProperty("com.mongodb.updaterSocketTimeoutMS", "20000"));
         private int heartbeatThreadCount;

src/test/com/mongodb/MongoClientOptionsTest.java

@@ -54,8 +54,8 @@ public void testBuilderDefaults() {
         assertEquals(false, options.isAutoConnectRetry());
         assertEquals(false, options.isAlwaysUseMBeans());
         assertEquals(5000, options.getHeartbeatFrequency());
-        assertEquals(10, options.getHeartbeatConnectRetryFrequency());
-        assertEquals(10, options.getMinHeartbeatFrequency());
+        assertEquals(500, options.getMinHeartbeatFrequency());
+        assertEquals(500, options.getHeartbeatConnectRetryFrequency());
         assertEquals(20000, options.getHeartbeatConnectTimeout());
         assertEquals(20000, options.getHeartbeatSocketTimeout());
         assertEquals(0, options.getHeartbeatThreadCount());
@@ -85,11 +85,11 @@ public void testSystemProperties() {
             assertEquals(options.getAcceptableLatencyDifference(), 25);
             assertEquals(options.getLocalThreshold(), 25);
         } finally {
-            System.setProperty("com.mongodb.updaterIntervalMS", "5000");
-            System.setProperty("com.mongodb.updaterIntervalNoMasterMS", "10");
-            System.setProperty("com.mongodb.updaterConnectTimeoutMS", "20000");
-            System.setProperty("com.mongodb.updaterSocketTimeoutMS", "20000");
-            System.setProperty("com.mongodb.slaveAcceptableLatencyMS", "15");
+            System.clearProperty("com.mongodb.updaterIntervalMS");
+            System.clearProperty("com.mongodb.updaterIntervalNoMasterMS");
+            System.clearProperty("com.mongodb.updaterConnectTimeoutMS");
+            System.clearProperty("com.mongodb.updaterSocketTimeoutMS");
+            System.clearProperty("com.mongodb.slaveAcceptableLatencyMS");
         }
     }