RedisConnectionException should be throw if Redisson can't connect to servers. #343

src/main/java/org/redisson/cluster/ClusterConnectionManager.java

@@ -64,7 +64,7 @@ public class ClusterConnectionManager extends MasterSlaveConnectionManager {
         init(this.config);
 
         for (URI addr : cfg.getNodeAddresses()) {
-            RedisConnection connection = connect(cfg, addr);
+            RedisConnection connection = connect(cfg, addr, true);
             if (connection == null) {
                 continue;
             }
@@ -73,7 +73,7 @@ public class ClusterConnectionManager extends MasterSlaveConnectionManager {
 
             Collection<ClusterPartition> partitions = parsePartitions(nodesValue);
             for (ClusterPartition partition : partitions) {
-                Collection<Future<Void>> s = addMasterEntry(partition, cfg);
+                Collection<Future<Void>> s = addMasterEntry(partition, cfg, true);
                 for (Future<Void> future : s) {
                     future.syncUninterruptibly();
                 }
@@ -82,10 +82,14 @@ public class ClusterConnectionManager extends MasterSlaveConnectionManager {
             break;
         }
 
+        if (lastPartitions.isEmpty()) {
+            throw new RedisConnectionException("Can't connect to servers!");
+        }
+
         monitorClusterChange(cfg);
     }
 
-    private RedisConnection connect(ClusterServersConfig cfg, URI addr) {
+    private RedisConnection connect(ClusterServersConfig cfg, URI addr, boolean skipLogging) {
         RedisConnection connection = nodeConnections.get(addr);
         if (connection != null) {
             return connection;
@@ -95,12 +99,18 @@ public class ClusterConnectionManager extends MasterSlaveConnectionManager {
             connection = client.connect();
             nodeConnections.put(addr, connection);
         } catch (RedisConnectionException e) {
+            if (!skipLogging) {
                 log.warn(e.getMessage(), e);
+            }
         } catch (Exception e) {
+            if (!skipLogging) {
                 log.error(e.getMessage(), e);
             }
+        }
         if (connection != null && !connection.isActive()) {
-            log.warn("connection for {} is not active!", connection.getRedisClient().getAddr());
+            if (!skipLogging) {
+                log.warn("connection to {} is not active!", connection.getRedisClient().getAddr());
+            }
             connection.closeAsync();
             connection = null;
         }
@@ -114,14 +124,14 @@ public class ClusterConnectionManager extends MasterSlaveConnectionManager {
     protected void initEntry(MasterSlaveServersConfig config) {
     }
 
-    private Collection<Future<Void>> addMasterEntry(final ClusterPartition partition, ClusterServersConfig cfg) {
+    private Collection<Future<Void>> addMasterEntry(final ClusterPartition partition, ClusterServersConfig cfg, boolean skipLogging) {
         if (partition.isMasterFail()) {
             log.warn("add master: {} for slot ranges: {} failed. Reason - server has FAIL flag", partition.getMasterAddress(), partition.getSlotRanges());
             Future<Void> f = newSucceededFuture(null);
             return Collections.singletonList(f);
         }
 
-        RedisConnection connection = connect(cfg, partition.getMasterAddress());
+        RedisConnection connection = connect(cfg, partition.getMasterAddress(), skipLogging);
         if (connection == null) {
             Future<Void> f = newSucceededFuture(null);
             return Collections.singletonList(f);
@@ -163,7 +173,7 @@ public class ClusterConnectionManager extends MasterSlaveConnectionManager {
                 try {
                     for (ClusterPartition partition : lastPartitions.values()) {
                         for (URI uri : partition.getAllAddresses()) {
-                            RedisConnection connection = connect(cfg, uri);
+                            RedisConnection connection = connect(cfg, uri, false);
                             if (connection == null) {
                                 continue;
                             }
@@ -306,7 +316,7 @@ public class ClusterConnectionManager extends MasterSlaveConnectionManager {
                 }
             }
             if (!masterFound) {
-                addMasterEntry(partition, cfg);
+                addMasterEntry(partition, cfg, false);
             }
         }
     }

src/main/java/org/redisson/connection/ElasticacheConnectionManager.java

@@ -83,6 +83,11 @@ public class ElasticacheConnectionManager extends MasterSlaveConnectionManager {
                 this.config.addSlaveAddress(addr);
             }
         }
+
+        if (currentMaster.get() == null) {
+            throw new RedisConnectionException("Can't connect to servers!");
+        }
+
         init(this.config);
 
         monitorRoleChange(cfg);

src/main/java/org/redisson/connection/SentinelConnectionManager.java

@@ -116,14 +116,14 @@ public class SentinelConnectionManager extends MasterSlaveConnectionManager {
                 }
                 break;
             } catch (RedisConnectionException e) {
-                log.warn("Can't connect to sentinel. {}", e.getMessage());
+                log.warn("Can't connect to sentinel server. {}", e.getMessage());
             } finally {
                 client.shutdownAsync();
             }
         }
 
         if (currentMaster.get() == null) {
-            throw new IllegalStateException("Can't connect to servers!");
+            throw new RedisConnectionException("Can't connect to servers!");
         }
         init(c);