.setLoggerName("test.logger")
                .setLevel(Level.WARN)
                .setMessage(new SimpleMessage("test warn message"))
                .build();

        LogEvent result = policy.rewrite(warnEvent);

        assertSame(warnEvent, result);
        assertEquals(Level.WARN, result.getLevel());
    }

    public void test_rewrite_info_level() {

        } catch (final Exception e) {
            logger.warn("Failed to delete UrlFilter for {}", sid, e);
        }

        try {
            // clear queue
            urlQueueService.clearCache();
            urlQueueService.delete(sid);
        } catch (final Exception e) {
            logger.warn("Failed to delete UrlQueue for {}", sid, e);
        }

        try {

            log.warn("Response buffer too small: {} < {}", buffer.length, expectedSize);
            throw new SmbException("Response buffer too small: " + buffer.length + " < " + expectedSize);
        }

        if (buffer.length > maxSize) {
            failedValidations.incrementAndGet();
            bufferOverflowsPrevented.incrementAndGet();

                    final String password = paramMap.get(CRAWLER_FILE_AUTH + "." + fileAuthName + ".password");

                    if (StringUtil.isEmpty(username)) {
                        logger.warn("username is empty. fileAuth:{}", fileAuthName);
                        continue;
                    }

                    final SmbAuthentication smbAuth = new SmbAuthentication();

        });
        try {
            badWordService.store(entity);
            suggestHelper.addBadWord(entity.getSuggestWord(), false);
        } catch (final Exception e) {
            logger.warn("Failed to process a request.", e);
            throwValidationErrorApi(messages -> messages.addErrorsCrudFailedToCreateCrudTable(GLOBAL, buildThrowableMessage(e)));
        }

        }
    }

    /**
     * Outputs WARN information.
     *
     * @param message
     *            Message
     * @param throwable
     *            Exception
     */
    public void warn(final Object message, final Throwable throwable) {
        log.warn(toString(message), throwable);
    }

    /**
     * Outputs WARN information.
     *
     * @param message

        // Check for null bytes
        if (NULL_BYTE.matcher(path).find()) {
            log.warn("Path contains null bytes: {}", sanitizeForLog(path));
            throw new SmbException("Path contains null bytes");
        }

        // Check for control characters
        if (strictMode && CONTROL_CHARS.matcher(path).find()) {
            log.warn("Path contains control characters: {}", sanitizeForLog(path));

```
cd /usr/hdp/current/spark2-client
su spark
```

- Run the Apache Spark Pi job in yarn-client mode, using code from **org.apache.spark**:

```
./bin/spark-submit --class org.apache.spark.examples.SparkPi \
    --master yarn-client \
    --num-executors 1 \
    --driver-memory 512m \
    --executor-memory 512m \
    --executor-cores 1 \

                    } catch (final Exception e) {
                        logger.warn("Failed to install {}", filename, e);
                    } finally {
                        if (tempFile.exists() && !tempFile.delete()) {
                            logger.warn("Failed to delete {}.", tempFile.getAbsolutePath());
                        }
                    }
                }).start();

            thumbnailQueueThread.join(10000);
        } catch (final InterruptedException e) {
            logger.warn("Thumbnail thread is timeouted.", e);
        }
        generatorList.forEach(g -> {
            try {
                g.destroy();
            } catch (final Exception e) {
                logger.warn("Failed to stop thumbnail generator.", e);
            }
        });
    }

    /**