Merge pull request #7140 from luiseufrasio/FISH-61-cannot-change-buff…

…er-size-p6

FISH-61 : only checking if response was commited

appserver/web/web-core/src/main/java/org/apache/catalina/connector/Response.java

@@ -55,7 +55,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-// Portions Copyright [2019-2023] Payara Foundation and/or affiliates
+// Portions Copyright [2019-2024] Payara Foundation and/or affiliates
 
 package org.apache.catalina.connector;
 
@@ -901,15 +901,12 @@ public void resetBuffer(boolean resetWriterStreamFlags) {
      */
     @Override
     public void setBufferSize(int size) {
-
-        if (isCommitted() || !outputBuffer.isNew())
+        if (isCommitted()) {
             throw new IllegalStateException(rb.getString(LogFacade.CANNOT_CHANGE_BUFFER_SIZE_EXCEPTION));
-
+        }
         outputBuffer.setBufferSize(size);
-
     }
 
-
     /**
      * Set the content length (in bytes) for this Response.
      *