Merge pull request #2277 from adamretter/hotfix/export-thread-naming-5.0.0

(5.x.x) Fix a regression in ExportGUI

Author: dizzzz

src/org/exist/backup/ExportGUI.java

@@ -47,6 +47,7 @@
 import org.exist.security.PermissionDeniedException;
 
 import static java.nio.charset.StandardCharsets.UTF_8;
+import static org.exist.util.ThreadUtils.newGlobalThread;
 import static org.exist.util.ThreadUtils.newInstanceThread;
 
 
@@ -338,7 +339,11 @@ private void startBtncheck(java.awt.event.ActionEvent evt) { // GEN-FIRST:event_
                 closeLog();
             }
         };
-        newInstanceThread(pool, "export-gui.check-run", checkRun).start();
+        if (pool != null) {
+            newInstanceThread(pool, "export-gui.check-run", checkRun).start();
+        } else {
+            newGlobalThread("export-gui.check-run", checkRun).start();
+        }
     } // GEN-LAST:event_startBtncheck
 
 
@@ -359,7 +364,11 @@ private void exportBtnActionPerformed(java.awt.event.ActionEvent evt) { // GEN-F
                 closeLog();
             }
         };
-        newInstanceThread(pool, "export-gui.export", th).start();
+        if (pool != null) {
+            newInstanceThread(pool, "export-gui.export", th).start();
+        } else {
+            newGlobalThread("export-gui.export", th).start();
+        }
     } // GEN-LAST:event_exportBtnActionPerformed