bugfix redis collector create too many instance case oom (apache#734)

* bugfix redis collector create too many instance * bugfix redis collector create too many instance * bugfix redis collector create too many instance

Author: tomsun28

collector/src/main/java/com/usthe/collector/collect/common/cache/RedisConnect.java

@@ -18,7 +18,6 @@
 package com.usthe.collector.collect.common.cache;
 
 import io.lettuce.core.api.StatefulConnection;
-import io.lettuce.core.api.StatefulRedisConnection;
 import lombok.extern.slf4j.Slf4j;
 
 /**

collector/src/main/java/com/usthe/collector/collect/mongodb/MongodbSingleCollectImpl.java

@@ -23,6 +23,7 @@
 import java.util.Optional;
 
 import com.mongodb.MongoServerUnavailableException;
+import com.mongodb.MongoTimeoutException;
 import com.usthe.collector.collect.common.cache.CacheIdentifier;
 import com.usthe.collector.collect.common.cache.CommonCache;
 import com.usthe.collector.collect.common.cache.MongodbConnect;
@@ -116,7 +117,7 @@ public void collect(Builder builder, long appId, String app, Metrics metrics) {
  }
  fillBuilder(metrics, valueRowBuilder, document);
  builder.addValues(valueRowBuilder.build());
- } catch (MongoServerUnavailableException unavailableException) {
+ } catch (MongoServerUnavailableException | MongoTimeoutException unavailableException) {
  builder.setCode(CollectRep.Code.UN_CONNECTABLE);
  String message = CommonUtil.getMessageFromThrowable(unavailableException);
  builder.setMsg(message);