}
        }
    }

    @Nested
    @DisplayName("Error Handling")
    class ErrorHandlingTests {

        @Test
        @DisplayName("should handle malformed POM gracefully")
        void shouldHandleMalformedPOMGracefully() throws Exception {
            String malformedPomXml = """
                <?xml version="1.0" encoding="UTF-8"?>

    /**
     * Flag representing parser processing result: if there were some fatal errors during
     * {@link Parser#parseInvocation(ParserRequest)} this method will return {@code true} and invoker should
     * handle this request as "early failure". In these cases, {@link #options()} usually is absent.
     */
    boolean parsingFailed();

    /**
     * Returns {@code true} if this call happens in "embedded" mode.
     *

    checkstyleConfig(rootProject.libs.checkStyle) {
      isTransitive = false
    }
  }

  val androidSignature by configurations.creating
  val jvmSignature by configurations.creating

  // Handled in :okhttp directly
  if (project.name != "okhttp") {
    configure<CheckstyleExtension> {
      config = resources.text.fromArchiveEntry(checkstyleConfig, "google_checks.xml")

Sometimes there's an action required like calling the application layer or responding to a ping, and the thread discovering the action is not the thread that should do the work. We enqueue a runnable on this executor and it gets handled by one of the executor's threads.

### Locks

We have 3 different things that we synchronize on.

#### Http2Connection

      advanced/conditional-openapi.md: how-to/conditional-openapi.md
      advanced/extending-openapi.md: how-to/extending-openapi.md
      advanced/testing-database.md: how-to/testing-database.md
  mkdocstrings:
    handlers:
      python:
        options:
          extensions:
          - griffe_typingdoc
          show_root_heading: true
          show_if_no_docstring: true
          preload_modules:
          - httpx

          executionThread.start();
        }
      };

  @Override
  protected final void tearDown() {
    tearDownStack.runTearDown();
    assertWithMessage("exceptions should not be propagated to uncaught exception handlers")
        .that(thrownByExecutionThread)
        .isNull();
  }

  public void testServiceStartStop() throws Exception {
    WaitOnRunService service = new WaitOnRunService();
    assertFalse(service.startUpCalled);

                    "Elapsed time should match calculated duration between start and now");
        }
    }

    @Test
    @DisplayName("MonotonicClock should handle rapid successive calls")
    void testRapidCalls() {
        Instant[] instants = new Instant[1000];
        for (int i = 0; i < instants.length; i++) {
            instants[i] = MonotonicClock.now();
        }

## Other middlewares { #other-middlewares }

You can later read more about other middlewares in the [Advanced User Guide: Advanced Middleware](../advanced/middleware.md){.internal-link target=_blank}.

            item + " must not be Object#equals to its Object#toString representation",
            !item.equals(item.toString()));
      }
    }
  }

  /**
   * Class used to test whether equals() correctly handles an instance of an incompatible class.
   * Since it is a private inner class, the invoker can never pass in an instance to the tester
   */
  private enum NotAnInstance {
    EQUAL_TO_NOTHING;
  }

          executionThread.start();
        }
      };

  @Override
  protected final void tearDown() {
    tearDownStack.runTearDown();
    assertWithMessage("exceptions should not be propagated to uncaught exception handlers")
        .that(thrownByExecutionThread)
        .isNull();
  }

  public void testServiceStartStop() throws Exception {
    WaitOnRunService service = new WaitOnRunService();
    assertFalse(service.startUpCalled);