if (logger.isDebugEnabled()) {
                logger.debug("Added URL to queue: url={}, sessionId={}", url, crawlerContext.sessionId);
            }
        } catch (final Exception e) {
            logger.warn("Failed to add URL to crawling queue: url={}, sessionId={}", url, crawlerContext.sessionId, e);
        }
        urlFilter.processUrl(url);
    }

    /**

                log.info("RDMA connection established to {}", delegate.getRemoteAddress());
            } catch (IOException e) {
                log.warn("Failed to establish RDMA connection: {}", e.getMessage());
                throw e;
            }
        }
    }

    /**
     * Checks if RDMA connection is available.

                }
            }

            messageBuffer.flip();
            return messageBuffer;

        } catch (SocketTimeoutException e) {
            return null; // Timeout
        } catch (IOException e) {
            state = RdmaConnectionState.ERROR;
            throw new IOException("TCP RDMA receive failed", e);
        }
    }

    @Override

    bestGetCheckedTypeValidator().validateClass(exceptionClass);
    try {
      return future.get(timeout, unit);
    } catch (InterruptedException e) {
      currentThread().interrupt();
      throw newWithCause(exceptionClass, e);
    } catch (TimeoutException e) {
      throw newWithCause(exceptionClass, e);
    } catch (ExecutionException e) {
      wrapAndThrowExceptionOrError(e.getCause(), exceptionClass);
      throw new AssertionError();

                } catch (final Exception e) {
                    responseData.setMimeType(mimeTypeHelper.getContentType(null, statObject.object()));
                }
            }
        } catch (final CrawlerSystemException e) {
            CloseableUtil.closeQuietly(responseData);
            throw e;
        } catch (final Exception e) {

                fos = null; // Successfully wrapped, no need to close explicitly
            } catch (final Exception e) {
                if (fos != null) {
                    try {
                        fos.close();
                    } catch (final IOException ioe) {
                        // Ignore close exception
                    }
                }

                    }
                    return this.treeHandle;

                } catch (InterruptedException ie) {
                    Thread.currentThread().interrupt();
                    throw new SmbException("Connection retry interrupted", ie);
                } catch (CIFSException retryException) {
                    log.debug("Connection retry also failed", retryException);

                scheduleRecoveryWithTransport(failedChannel, state, testTransport);
            } else {
                // Remove channel after max retries
                removeChannel(failedChannel);
            }
        } catch (Exception e) {
            // Recovery not possible, remove synchronously
            removeChannel(failedChannel);
            return;
        }
    }

    /**
     * Shutdown the failover handler
     */

      this.everyMillis = everyMillis;
      this.interruptee = interruptee;
    }

    @Override
    public void run() {
      while (true) {
        try {
          Thread.sleep(everyMillis);
        } catch (InterruptedException e) {
          // ok. just stop sleeping.
        }
        if (shouldStop) {
          break;
        }
        interruptee.interrupt();
      }
    }

    void stopInterrupting() {

            }
        } catch (final CrawlerSystemException e) {
            throw e;
        } catch (final InterruptedException e) {
            if (mt != null && mt.isTeminated()) {
                throw new ExecutionTimeoutException("The command execution is timeout: " + cmdList, e);
            }
            throw new InterruptedRuntimeException(e);
        } catch (final Exception e) {