throw ProtocolException("unexpected end of stream")
      }
      try {
        super.close()
        complete(null)
      } catch (e: IOException) {
        throw complete(e)!!
      }
    }

    /** If [e] is non-null, this will return a non-null value. */
    private fun complete(e: IOException?): IOException? {
      if (completed) return e
      completed = true
      return bodyComplete(

        } catch (Exception e) {
            // Expected
        }
        long duration = System.currentTimeMillis() - startTime;

        // Test should complete in under 1 second (much less than the original 25+ seconds)
        assertTrue("Test should complete quickly (duration: " + duration + "ms)", duration < 1000);
    }

    // Fast mock implementations to minimize overhead

      boolean set(@Nullable V v) {
        return complete(v, null, COMPLETED);
      }

      /** Transition to the COMPLETED state and set the exception. */
      boolean setException(Throwable t) {
        return complete(null, t, COMPLETED);
      }

      /** Transition to the CANCELLED or INTERRUPTED state. */
      boolean cancel(boolean interrupt) {
        return complete(null, null, interrupt ? INTERRUPTED : CANCELLED);

            Set<String> sessionIds = processHelper.getRunningSessionIdSet();
            assertTrue(sessionIds.contains(sessionId));

            // Wait a bit for the process to complete
            Thread.sleep(100);

            // Clean up
            processHelper.destroyProcess(sessionId);
        } catch (Exception e) {
            fail("Unexpected exception: " + e.getMessage());

      boolean set(@Nullable V v) {
        return complete(v, null, COMPLETED);
      }

      /** Transition to the COMPLETED state and set the exception. */
      boolean setException(Throwable t) {
        return complete(null, t, COMPLETED);
      }

      /** Transition to the CANCELLED or INTERRUPTED state. */
      boolean cancel(boolean interrupt) {
        return complete(null, null, interrupt ? INTERRUPTED : CANCELLED);

            });
        }

        // Start all threads simultaneously
        startLatch.countDown();

        // Wait for completion
        assertTrue(endLatch.await(30, TimeUnit.SECONDS), "All threads should complete within timeout");
        executor.shutdown();

        // Then - Verify no exceptions occurred
        if (!exceptions.isEmpty()) {
            fail("Concurrent operations caused exceptions: " + exceptions.get(0));

                return jarPath;
            }
        };

        try {
            Artifact artifact = new Artifact("fess-theme-complete", "1.0.0");
            mockThemeHelper.install(artifact);
            assertTrue(true); // Should complete without exception
        } catch (Exception e) {
            // May fail due to ResourceUtil dependencies in test environment
            assertTrue(true);

            latch.countDown();
        });

        deferred.resolve(new SuggestResponse("", 0, Collections.emptyList(), 0, null));

        assertTrue("All callbacks should complete", latch.await(10, TimeUnit.SECONDS));
        assertEquals("All 3 callbacks should be invoked", 3, callbackCount.get());
    }

    @Test
    public void test_multipleErrorCallbacks_allInvoked() throws Exception {

        Thread.sleep(50);

        // Release all threads to start simultaneously
        startLatch.countDown();

        // Wait for writer thread to complete
        writerThread.join(1000);

        // Wait for all reader threads to complete
        for (Thread thread : readerThreads) {
            thread.join(testDurationMs + 1000);
        }

        // Verify that alive was changed to false

            });
            threads[i].start();
        }

        // Wait for all threads to complete
        for (Thread thread : threads) {
            thread.join();
        }

        // Then - should complete without errors
        assertTrue(true, "Concurrent setFileId calls should complete without issues");
    }

    @Test
    @DisplayName("Should handle file ID with special patterns")