chore: disable virtual threads by default (#2333)

efgpinto · web-flow · commit cb52ab3b82d3 · 2025-08-06T16:16:37.000+02:00
diff --git a/sdk/java-sdk-protobuf/src/main/resources/reference.conf b/sdk/java-sdk-protobuf/src/main/resources/reference.conf
@@ -107,10 +107,8 @@ kalix {
   }
 
   sdk-dispatcher {
-    executor = "virtual-thread-executor"
-    virtual-thread-executor {
-      # if not on JDK 21
-      fallback="fork-join-executor"
-    }
+    # Virtual threads usage can be enabled by changing the executor to be "virtual-thread-executor"
+    # by default, using the fork join executor for now due to existing issue: https://openjdk.org/jeps/491
+    executor = "fork-join-executor"
   }
 }

Original file line number	Diff line number	Diff line change
`@@ -107,10 +107,8 @@ kalix {`
`107`	`107`	`}`
`108`	`108`
`109`	`109`	`sdk-dispatcher {`
`110`		`- executor = "virtual-thread-executor"`
`111`		`- virtual-thread-executor {`
`112`		`- # if not on JDK 21`
`113`		`- fallback="fork-join-executor"`
`114`		`- }`
	`110`	`+ # Virtual threads usage can be enabled by changing the executor to be "virtual-thread-executor"`
	`111`	`+ # by default, using the fork join executor for now due to existing issue: https://openjdk.org/jeps/491`
	`112`	`+ executor = "fork-join-executor"`
`115`	`113`	`}`
`116`	`114`	`}`