response.writeBytesWireFormat(buffer2, 0);
            });

            thread1.start();
            thread2.start();
            thread1.join();
            thread2.join();

            // Then - no exceptions should occur
            assertTrue(true);
        }
    }

            } catch (IOException e) {
                log.debug("Error closing server socket", e);
            }
        }

        if (serverThread != null) {
            try {
                serverThread.join(5000); // Wait up to 5 seconds
            } catch (InterruptedException e) {
                Thread.currentThread().interrupt();
            }
        }

        registrations.clear();

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

        // Wait for all threads
        for (Thread thread : updateThreads) {
            thread.join(5000);
        }
        for (Thread thread : readThreads) {
            thread.join(5000);
        }

        // Verify final state
        assertEquals(100, entry.getChildren().size());
        assertTrue(entry.hasChanges());
    }

            final float boost, final String field, final String[] texts) {
        final String text = String.join(" ", texts);

        if (Constants.DEFAULT_FIELD.equals(field)) {
            context.addFieldLog(field, text);
            stream(texts).of(stream -> stream.forEach(t -> context.addHighlightedQuery(t)));

        } catch (final Exception e) {
            throw new CrawlerSystemException(e);
        }
    }

    public void stop() {
        try {
            server.stop();
            server.join();
        } catch (final Exception e) {
            throw new CrawlerSystemException(e);
        } finally {
            if (tempDocRoot) {
                docRoot.delete();
            }
        }
    }

         * Interrupted exceptions are caught and logged at debug level.
         */
        public void awaitTermination() {
            try {
                join();
            } catch (final InterruptedException e) {
                if (logger.isDebugEnabled()) {
                    logger.debug("Interrupted.", e);
                }
            }
        }

            }
            this.thread = null;
        }
        t.interrupt();
        if (logger.isDebugEnabled()) {
            logger.debug("TimeoutManager stopped.");
        }
        t.join(timeoutMillis);
        return !t.isAlive();
    }

    /**
     * Clears the managed {@link TimeoutTask}.
     */
    public synchronized void clear() {
        timeoutTaskList.clear();
    }

        } catch (final Exception e) {
            throw new CrawlerSystemException(e);
        }
    }

    public void stop() {
        try {
            server.stop();
            server.join();
        } catch (final Exception e) {
            throw new CrawlerSystemException(e);
        } finally {
            if (tempDocRoot) {
                docRoot.delete();
            }
        }
    }

                throw new CrawlerSystemException(e);
            }
        }

        public void stop() {
            try {
                server.stop();
                server.join();
            } catch (final Exception e) {
                throw new CrawlerSystemException(e);
            }
        }

        private static class RequestHandlerImpl extends AbstractHandler {

                urlFilter.addExclude(".*\\.type" + i + "$");
            }
        });

        thread1.start();
        thread2.start();

        thread1.join();
        thread2.join();

        // Should complete without errors
        assertNotNull(urlFilter);
    }

    /**
     * Test boundary conditions
     */
    public void test_boundaryConditions() {