backport fix for ArithmeticException

jetty · Dec 17, 2020 · 4478233 · 4478233
1 parent 38f0fc4
commit 4478233
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/jetty-util/src/main/java/org/eclipse/jetty/util/Pool.java b/jetty-util/src/main/java/org/eclipse/jetty/util/Pool.java
@@ -301,6 +301,11 @@ public Entry acquire()
             {
                 LOGGER.ignore(e);
                 size = entries.size();
+                // Size can be 0 when the pool is in the middle of
+                // acquiring a connection while another thread
+                // removes the last one from the pool.
+                if (size == 0)
+                    break;
             }
             index = (index + 1) % size;
         }