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rmaucher pushed a commit to branch 9.0.x
in repository https://gitbox.apache.org/repos/asf/tomcat.git


The following commit(s) were added to refs/heads/9.0.x by this push:
     new 43b50c4e9c Fix session average life calculation
43b50c4e9c is described below

commit 43b50c4e9cc6966077b2d3d052e706adadbaa8bf
Author: remm <[email protected]>
AuthorDate: Wed May 20 16:56:52 2026 +0200

    Fix session average life calculation
---
 java/org/apache/catalina/session/ManagerBase.java | 8 +++-----
 webapps/docs/changelog.xml                        | 3 +++
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/java/org/apache/catalina/session/ManagerBase.java 
b/java/org/apache/catalina/session/ManagerBase.java
index e4d2f5a734..888b802f79 100644
--- a/java/org/apache/catalina/session/ManagerBase.java
+++ b/java/org/apache/catalina/session/ManagerBase.java
@@ -1097,18 +1097,16 @@ public abstract class ManagerBase extends 
LifecycleMBeanBase implements Manager
 
         // Init
         int counter = 0;
-        int result = 0;
+        long sum = 0;
 
         // Calculate average
         for (SessionTiming timing : copy) {
             if (timing != null) {
-                int timeAlive = timing.getDuration();
                 counter++;
-                // Very careful not to overflow - probably not necessary
-                result = (result * ((counter - 1) / counter)) + (timeAlive / 
counter);
+                sum += timing.getDuration();
             }
         }
-        return result;
+        return counter > 0 ? (int) (sum / counter) : 0;
     }
 
 
diff --git a/webapps/docs/changelog.xml b/webapps/docs/changelog.xml
index 9e789d81fa..d0fc2360a4 100644
--- a/webapps/docs/changelog.xml
+++ b/webapps/docs/changelog.xml
@@ -129,6 +129,9 @@
         Avoid some NPEs in the Connector class on an uninitialize protocol.
         (remm)
       </fix>
+      <fix>
+        Incorrect session average life calculation. (remm)
+      </fix>
     </changelog>
   </subsection>
   <subsection name="Coyote">


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