diff --git a/src/main/java/io/personium/core/bar/BarFileInstaller.java b/src/main/java/io/personium/core/bar/BarFileInstaller.java
index a1ae8d1a0..3dc413629 100644
--- a/src/main/java/io/personium/core/bar/BarFileInstaller.java
+++ b/src/main/java/io/personium/core/bar/BarFileInstaller.java
@@ -340,6 +340,7 @@ private File storeTemporaryBarFile(InputStream inStream) {
                 try {
                     sync(((FileOutputStream) outStream).getFD());
                 } catch (Exception e) {
+                    IOUtils.closeQuietly(outStream);
                     throw PersoniumCoreException.Server.FILE_SYSTEM_ERROR.params(e.getMessage());
                 }
             }
diff --git a/src/main/java/io/personium/core/rs/cell/LogResource.java b/src/main/java/io/personium/core/rs/cell/LogResource.java
index 1f76971d5..946be474d 100644
--- a/src/main/java/io/personium/core/rs/cell/LogResource.java
+++ b/src/main/java/io/personium/core/rs/cell/LogResource.java
@@ -327,6 +327,7 @@ private Response getLog(final String logCollection, String logFileName) {
                 throw PersoniumCoreException.Dav.RESOURCE_NOT_FOUND.params(split[split.length - 1]);
             } catch (IOException e) {
                 log.info("Failed to read archive entry : " + e.getMessage());
+                IOUtils.closeQuietly(bis);
                 throw PersoniumCoreException.Event.ARCHIVE_FILE_CANNOT_OPEN;
             }
         }
diff --git a/src/main/java/io/personium/core/rs/odata/ODataSentMessageResource.java b/src/main/java/io/personium/core/rs/odata/ODataSentMessageResource.java
index 6d05f332b..8aa280254 100644
--- a/src/main/java/io/personium/core/rs/odata/ODataSentMessageResource.java
+++ b/src/main/java/io/personium/core/rs/odata/ODataSentMessageResource.java
@@ -36,11 +36,11 @@
 
 import org.apache.http.HttpResponse;
 import org.apache.http.HttpStatus;
-import org.apache.http.client.HttpClient;
 import org.apache.http.client.methods.HttpPost;
 import org.apache.http.client.utils.HttpClientUtils;
 import org.apache.http.entity.ContentType;
 import org.apache.http.entity.StringEntity;
+import org.apache.http.impl.client.CloseableHttpClient;
 import org.json.simple.JSONArray;
 import org.json.simple.JSONObject;
 import org.json.simple.parser.JSONParser;
@@ -430,7 +430,6 @@ private List<OProperty<?>> requestHttpReceivedMessage(
         String requestUrl = requestCellUrl + "__message/port";
 
         //Acquire request header, add content below
-        HttpClient client = HttpClientFactory.create(HttpClientFactory.TYPE_INSECURE);
         HttpPost req = new HttpPost(requestUrl);
 
         //Request body
@@ -450,7 +449,7 @@ private List<OProperty<?>> requestHttpReceivedMessage(
 
         //Throw a request
         HttpResponse objResponse = null;
-        try {
+        try (CloseableHttpClient client = HttpClientFactory.create(HttpClientFactory.TYPE_INSECURE)) {
             objResponse = client.execute(req);
 
             //Create Request Result
@@ -469,7 +468,6 @@ private List<OProperty<?>> requestHttpReceivedMessage(
             throw PersoniumCoreException.SentMessage.SM_CONNECTION_ERROR.reason(ioe);
         } finally {
             HttpClientUtils.closeQuietly(objResponse);
-            HttpClientUtils.closeQuietly(client);
         }
 
     }