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markt-asf 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 4b1eb9a166 Fix a gap in async error handling
4b1eb9a166 is described below

commit 4b1eb9a1664b10471f5740279d9f2e2259c5d108
Author: Mark Thomas <[email protected]>
AuthorDate: Mon Sep 28 17:21:23 2026 +0100

    Fix a gap in async error handling
---
 java/org/apache/coyote/AsyncStateMachine.java | 2 +-
 webapps/docs/changelog.xml                    | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/java/org/apache/coyote/AsyncStateMachine.java 
b/java/org/apache/coyote/AsyncStateMachine.java
index 41f4e16b6d..c48c7384be 100644
--- a/java/org/apache/coyote/AsyncStateMachine.java
+++ b/java/org/apache/coyote/AsyncStateMachine.java
@@ -220,7 +220,7 @@ class AsyncStateMachine {
     }
 
     boolean isAsyncError() {
-        return state == AsyncState.ERROR;
+        return state == AsyncState.ERROR || state == AsyncState.MUST_ERROR;
     }
 
     boolean isCompleting() {
diff --git a/webapps/docs/changelog.xml b/webapps/docs/changelog.xml
index b87bfa87de..7afc205446 100644
--- a/webapps/docs/changelog.xml
+++ b/webapps/docs/changelog.xml
@@ -223,6 +223,11 @@
       <fix>
         Allow for absolute host names in SNI checks. (markt)
       </fix>
+      <fix>
+        Correct a gap in asynchronous error handling that could lead to
+        unexpected <code>IllegalStateExceptions</code> for some error
+        conditions. (markt)
+      </fix>
     </changelog>
   </subsection>
   <subsection name="Jasper">


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