LUCENE-9485: Check early if Solr port 8983 is available (apache#1792)

dev-tools/scripts/smokeTestRelease.py

@@ -796,7 +796,12 @@ def readSolrOutput(p, startupEvent, failureEvent, logFile):
     startupEvent.set()
   finally:
     f.close()
-
+
+def is_port_in_use(port):
+    import socket
+    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
+        return s.connect_ex(('localhost', port)) == 0
+
 def testSolrExample(unpackPath, javaPath, isSrc):
   # test solr using some examples it comes with
   logFile = '%s/solr-example.log' % unpackPath
@@ -1456,6 +1461,9 @@ def smokeTest(java, baseURL, gitRevision, version, tmpDir, isSigned, local_keys,
     download('KEYS', keysFileURL, tmpDir, force_clean=FORCE_CLEAN)
     keysFile = '%s/KEYS' % (tmpDir)
 
+  if is_port_in_use(8983):
+    raise RuntimeError('Port 8983 is already in use. The smoketester needs it to test Solr')
+
   print()
   print('Test Lucene...')
   checkSigs('lucene', lucenePath, version, tmpDir, isSigned, keysFile)