Lock leak: controlled reproduction attempts and method (not reproduced), enqueue reader; restart plan for 12 October

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

scripts_probe/killtabl.py

@@ -0,0 +1,51 @@
+"""Controlled kill during the activation of a DDIC table (database table creation takes seconds)."""
+import json, os, signal, subprocess, sys, time
+sys.path.insert(0, "/Users/erhankeseli/projects/abap-llm/harness/scripts_probe")
+from lockprobe import *
+from killtest import VICTIM
+
+DDL = """@EndUserText.label : 'kill test'
+@AbapCatalog.enhancement.category : #NOT_EXTENSIBLE
+@AbapCatalog.tableCategory : #TRANSPARENT
+@AbapCatalog.deliveryClass : #A
+@AbapCatalog.dataMaintenance : #RESTRICTED
+define table {n} {{
+  key client : abap.clnt not null;
+  key item_id : abap.char(10) not null;
+  qty : abap.int4;
+  name : abap.char({w});
+}}"""
+
+def attempt(delay, n):
+    name = "ZPROBE0KT_%03d" % n
+    with McpClient() as m:
+        print("create", m.call("sap_create_object", {"objectType": "TABL", "objectName": name, "packageName": "$TMP", "description": "kill table"})[1][:50])
+        # first write alone, to learn how long it takes
+    args = {"objectType": "TABL", "objectName": name, "source": DDL.format(n=name.lower(), w=20 + n)}
+    p = subprocess.Popen([sys.executable, "-c", VICTIM, json.dumps(args)], stdout=subprocess.PIPE, text=True)
+    assert p.stdout.readline().strip() == "SENT"
+    t0 = time.time(); time.sleep(delay)
+    finished = p.poll() is not None
+    try:
+        os.kill(p.pid, signal.SIGKILL)
+    except ProcessLookupError:
+        finished = True
+    p.wait()
+    print("table write: victim %s after %.2f s" % ("had finished" if finished else "killed", time.time() - t0))
+    time.sleep(3)
+    out = {"name": name, "delay": delay, "finished_before_kill": finished}
+    with McpClient() as m:
+        out["enqueue"] = read_locks(m)
+        e, t = m.call("sap_push_source", {"objectType": "TABL", "objectName": name, "source": DDL.format(n=name.lower(), w=40 + n)})
+        out["second_write"] = t[:300]
+    out["leak"] = "[LOCK]" in out["second_write"] or ("ZPROBE0KT" in out["enqueue"] and "enqueue entries matching the probe prefixes: 0" not in out["enqueue"])
+    out["delete"] = delete_uris(["/sap/bc/adt/ddic/tables/" + name.lower()])
+    return out
+
+if __name__ == "__main__":
+    for i, d in enumerate(float(x) for x in sys.argv[1].split(",")):
+        o = attempt(d, int(sys.argv[2]) + i)
+        o["enqueue"] = o["enqueue"][:900]
+        print(json.dumps(o, indent=1))
+        if o["leak"]:
+            print("LEAK at delay", d, "object", o["name"]); break