Author: violetagg
Date: Wed Apr 12 15:34:26 2017
New Revision: 1791134

URL: http://svn.apache.org/viewvc?rev=1791134&view=rev
Log:
When there is no javax.servlet.WriteListener registered then a call to 
javax.servlet.ServletOutputStream#isReady will return 'false' instead of 
throwing IllegalStateException.

Modified:
    tomcat/trunk/java/org/apache/coyote/Response.java
    tomcat/trunk/webapps/docs/changelog.xml

Modified: tomcat/trunk/java/org/apache/coyote/Response.java
URL: 
http://svn.apache.org/viewvc/tomcat/trunk/java/org/apache/coyote/Response.java?rev=1791134&r1=1791133&r2=1791134&view=diff
==============================================================================
--- tomcat/trunk/java/org/apache/coyote/Response.java (original)
+++ tomcat/trunk/java/org/apache/coyote/Response.java Wed Apr 12 15:34:26 2017
@@ -25,6 +25,8 @@ import java.util.concurrent.atomic.Atomi
 
 import javax.servlet.WriteListener;
 
+import org.apache.juli.logging.Log;
+import org.apache.juli.logging.LogFactory;
 import org.apache.tomcat.util.buf.MessageBytes;
 import org.apache.tomcat.util.http.MimeHeaders;
 import org.apache.tomcat.util.http.parser.MediaType;
@@ -44,6 +46,8 @@ public final class Response {
 
     private static final StringManager sm = 
StringManager.getManager(Response.class);
 
+    private static final Log log = LogFactory.getLog(Response.class);
+
     // ----------------------------------------------------- Class Variables
 
     /**
@@ -614,7 +618,10 @@ public final class Response {
 
     public boolean isReady() {
         if (listener == null) {
-            throw new 
IllegalStateException(sm.getString("response.notNonBlocking"));
+            if (log.isDebugEnabled()) {
+                log.debug(sm.getString("response.notNonBlocking"));
+            }
+            return false;
         }
         // Assume write is not possible
         boolean ready = false;

Modified: tomcat/trunk/webapps/docs/changelog.xml
URL: 
http://svn.apache.org/viewvc/tomcat/trunk/webapps/docs/changelog.xml?rev=1791134&r1=1791133&r2=1791134&view=diff
==============================================================================
--- tomcat/trunk/webapps/docs/changelog.xml (original)
+++ tomcat/trunk/webapps/docs/changelog.xml Wed Apr 12 15:34:26 2017
@@ -90,6 +90,12 @@
         logging during shutdown, some of which have been observed when running
         the unit tests. (markt)
       </fix>
+      <fix>
+        When there is no <code>javax.servlet.WriteListener</code> registered
+        then a call to <code>javax.servlet.ServletOutputStream#isReady</code>
+        will return <code>false</code> instead of throwing
+        <code>IllegalStateException</code>. (violetagg)
+      </fix>
     </changelog>
   </subsection>
   <subsection name="Coyote">



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