fix: idle thread singleton (#171)

Author: hushengquan

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>com.qcloud.cos</groupId>
     <artifactId>hadoop-cos</artifactId>
-    <version>${hadoop.version}-8.3.21</version>
+    <version>${hadoop.version}-8.3.22</version>
     <packaging>jar</packaging>
 
     <name>Apache Hadoop Tencent Cloud COS Support</name>

src/main/java/org/apache/hadoop/fs/CosNativeFileSystemStore.java

@@ -295,6 +295,7 @@ private void innerInitCOSClient(URI uri, Configuration conf) throws IOException
                 CosNConfigKeys.COSN_CLIENT_SOCKET_TIMEOUTSEC,
                 CosNConfigKeys.DEFAULT_CLIENT_SOCKET_TIMEOUTSEC);
         config.setSocketTimeout(socketTimeoutSec * 1000);
+        config.setUseConnectionMonitor(true); // Idle线程单例化
 
         this.crc32cEnabled = conf.getBoolean(CosNConfigKeys.CRC32C_CHECKSUM_ENABLED,
                 CosNConfigKeys.DEFAULT_CRC32C_CHECKSUM_ENABLED);