项目中引入了RocketMQ作为消息中间件使用，在使用过程中，发现rmq会定期的往INFO日志中输出大量日志（对于web项目，会输出到catalina.out），如下：
13:00:02.612 INFO RocketmqClient[128]-[persistAll] Group: paopao_activityInfo_circle_all_%%qQEl6AGy ClientId: 10.49.16.12@bc8e79e56ebd48a08086fa66279f958e updateConsumeOffsetToBroker MessageQueue [topic=Qipu_Te
st_EntityNotification_Low_Topic_16, brokerName=broker-1, queueId=2] 3700772
13:00:02.612 INFO RocketmqClient[128]-[persistAll] Group: paopao_activityInfo_circle_all_%%qQEl6AGy ClientId: 10.49.16.12@bc8e79e56ebd48a08086fa66279f958e updateConsumeOffsetToBroker MessageQueue [topic=Qipu_Te
st_EntityNotification_Trivial_Topic_16, brokerName=broker-3, queueId=9] 2
13:00:02.612 INFO RocketmqClient[128]-[persistAll] Group: paopao_activityInfo_circle_all_%%qQEl6AGy ClientId: 10.49.16.12@bc8e79e56ebd48a08086fa66279f958e updateConsumeOffsetToBroker MessageQueue [topic=Qipu_Te
st_EntityNotification_Medium_Topic_16, brokerName=broker-1, queueId=0] 3518429
13:00:02.613 INFO RocketmqClient[128]-[persistAll] Group: paopao_activityInfo_circle_all_%%qQEl6AGy ClientId: 10.49.16.12@bc8e79e56ebd48a08086fa66279f958e updateConsumeOffsetToBroker MessageQueue [topic=Qipu_Te
st_EntityNotification_Low_Topic_16, brokerName=broker-1, queueId=3] 3698935
13:00:02.613 INFO RocketmqClient[128]-[persistAll] Group: paopao_activityInfo_circle_all_%%qQEl6AGy ClientId: 10.49.16.12@bc8e79e56ebd48a08086fa66279f958e updateConsumeOffsetToBroker MessageQueue [topic=Qipu_Te
st_EntityNotification_Low_Topic_16, brokerName=broker-1, queueId=1] 3697798
13:00:02.613 INFO RocketmqClient[128]-[persistAll] Group: paopao_activityInfo_circle_all_%%qQEl6AGy ClientId: 10.49.16.12@bc8e79e56ebd48a08086fa66279f958e updateConsumeOffsetToBroker MessageQueue [topic=Qipu_Te
st_EntityNotification_Low_Topic_16, brokerName=broker-2, queueId=14] 3694691
这样的日志一方面会给系统io带来负担，另一方面会淹没其他日志信息，那该如何禁用掉该日志呢？
RocketMQ中ClientLog类分析：
RocketMQ client的源码中，关于日志的类如下：
import java.lang.reflect.Method;
import java.net.URL;
import org.apache.rocketmq.common.constant.LoggerName;
import org.slf4j.ILoggerFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class ClientLogger {
public static final String CLIENT_LOG_ROOT = "rocketmq.client.logRoot";
public static final String CLIENT_LOG_MAXINDEX = "rocketmq.client.logFileMaxIndex";
public static final String CLIENT_LOG_LEVEL = "rocketmq.client.logLevel";
private static Logger log;
static {
log = createLogger(LoggerName.CLIENT_LOGGER_NAME);
}
private static Logger createLogger(final String loggerName) {
String logConfigFilePath =
System.getProperty("rocketmq.client.log.configFile",
System.getenv("ROCKETMQ_CLIENT_LOG_CONFIGFILE"));
Boolean isloadconfig =
Boolean.parseBoolean(System.getProperty("rocketmq.client.log.loadconfig", "true"));
final String log4JResourceFile =
System.getProperty("rocketmq.client.log4j.resource.fileName", "log4j_rocketmq_client.xml");
final String logbackResourceFile =
System.getProperty("rocketmq.client.logback.resource.fileName", "logback_rocketmq_client.xml");
String clientLogRoot = System.getProperty(CLIENT_LOG_ROOT, "${user.home}/logs/rocketmqlogs");
System.setProperty("client.logRoot", clientLogRoot);
String clientLogLevel = System.getProperty(CLIENT_LOG_LEVEL, "INFO");
System.setProperty("client.logLevel", clientLogLevel);
String clientLogMaxIndex = System.getProperty(CLIENT_LOG_MAXINDEX, "10");
System.setProperty("client.logFileMaxIndex", clientLogMaxIndex);
if (isloadconfig) {
try {
ILoggerFactory iLoggerFactory = LoggerFactory.getILoggerFactory();
Class classType = iLoggerFactory.getClass();
if (classType.getName().equals("org.slf4j.impl.Log4jLoggerFactory")) {
Class<?> domconfigurator;
Object domconfiguratorobj;
domconfigurator = Class.forName("org.apache.log4j.xml.DOMConfigurator");
domconfiguratorobj = domconfigurator.newInstance();
if (null == logConfigFilePath) {
Method configure = domconfiguratorobj.getClass().getMethod("configure", URL.class);
URL url = ClientLogger.class.getClassLoader().getResource(log4JResourceFile);
configure.invoke(domconfiguratorobj, url);
} else {
Method configure = domconfiguratorobj.getClass().getMethod("configure", String.class);
configure.invoke(domconfiguratorobj, logConfigFilePath);
}
} else if (classType.getName().equals("ch.qos.logback.classic.LoggerContext")) {
Class<?> joranConfigurator;
Class<?> context = Class.forName("ch.qos.logback.core.Context");
Object joranConfiguratoroObj;
joranConfigurator = Class.forName("ch.qos.logback.classic.joran.JoranConfigurator");
joranConfiguratoroObj = joranConfigurator.newInstance();
Method setContext = joranConfiguratoroObj.getClass().getMethod("setContext", context);
setContext.invoke(joranConfiguratoroObj, iLoggerFactory);
if (null == logConfigFilePath) {
URL url = ClientLogger.class.getClassLoader().getResource(logbackResourceFile);
Method doConfigure =
joranConfiguratoroObj.getClass().getMethod("doConfigure", URL.class);
doConfigure.invoke(joranConfiguratoroObj, url);
} else {
Method doConfigure =
joranConfiguratoroObj.getClass().getMethod("doConfigure", String.class);
doConfigure.invoke(joranConfiguratoroObj, logConfigFilePath);
}
}
} catch (Exception e) {
System.err.println(e);
}
}
return LoggerFactory.getLogger(LoggerName.CLIENT_LOGGER_NAME);
}1、rmq日志相关的配置：
rocketmq.client.log.loadconfig
默认 true，是否加载指定配置文件，当设置为 false 时，RocketMQ 客户端会会使用应用本身的日志配置。这可能反而是最简单的日志配置方式rocketmq.client.log4j.resource.fileName、rocketmq.client.logback.resource.fileName、rocketmq.client.log4j2.resource.fileName
三种日志框架的的配置文件名，默认值分别为 log4j_rocketmq_client.xml、logback_rocketmq_client.xml、log4j2_rocketmq_client.xmlrocketmq.client.log.configFile
日志配置文件路径，上述。如果使用了自定义的日志配置文件，通常你不再需要设置以下的变量了rocketmq.client.logRoot
RocketMQ 日志信息默认存放日志为：$USER_HOME/Logs/rocketmqLogs，通过改变此变量可以变更日志路径rocketmq.client.logLevel
日志输出级别，默认 INFOrocketmq.client.logFileMaxIndex
滚动窗口的索引最大值，默认 10
上面的这些参数，可以通过以下三种方式来配置：
- 系统环境变量（PATH）：源码中有通过System.getenv("ROCKETMQ_CLIENT_LOG_CONFIGFILE")来获取文件路径，所以可以设置环境变量来设置该参数
ROCKETMQ_CLIENT_LOG_CONFIGFILE=<custom-file> - 系统参数：源码中大量地方通过System.getProperty("rocketmq.client.log.configFile")方式获取变量信息，可以通过JVM系统参数来设置，
rocketmq.client.log.configFile=<customer-file>，作为 JVM 变量，启动时时需要增加 -D 标识，优先级也比环境变量更高 - 在代码中通过
System.setProperty(“rocketmq.client.log.configFile”, customer_file)来配置
2、rmq支持log4j、logback两种日志框架：
源码中可以看到，有通过反射来获取日志实现类，通过这两个类名可以得出rmq支持log4j和logback框架。
//log4j
if (classType.getName().equals("org.slf4j.impl.Log4jLoggerFactory")) {
//logback
else if (classType.getName().equals("ch.qos.logback.classic.LoggerContext")) {
解决方案：
1、工程使用的是slf4j+log4j日志框架：
可以通过添加JVM启动参数，指定RocketMQ的日志输出等级，将其设置为ERROR即可。对于部署到tomcat的web应用，修改catalina.sh文件，找到elif [ "$1" = "start" ] ; then代码处，添加如下内容：
-Drocketmq.client.logLevel=\"ERROR\" \2、工程使用的是slf4j+log4j2日志框架：
添加RocketmqClient logger配置，如下：
<loggers>
<root level="INFO">
<appender-ref ref="RollingFile"/>
<appender-ref ref="ErrorRollingFile"/>
</root>
<logger name="RocketmqClient" level="ERROR" additivity="false">
<appender-ref ref="ErrorRollingFile"/>
</logger>
</loggers>logger的名字为什么是RocketmqClient呢？可以通过rmq源码中return LoggerFactory.getLogger(LoggerName.CLIENT_LOGGER_NAME); 来得出，
public class LoggerName {
public static final String FILTERSRV_LOGGER_NAME = "RocketmqFiltersrv";
public static final String NAMESRV_LOGGER_NAME = "RocketmqNamesrv";
public static final String BROKER_LOGGER_NAME = "RocketmqBroker";
public static final String BROKER_CONSOLE_NAME = "RocketmqConsole";
public static final String CLIENT_LOGGER_NAME = "RocketmqClient";
public static final String TOOLS_LOGGER_NAME = "RocketmqTools";
public static final String COMMON_LOGGER_NAME = "RocketmqCommon";
public static final String STORE_LOGGER_NAME = "RocketmqStore";
public static final String STORE_ERROR_LOGGER_NAME = "RocketmqStoreError";
public static final String TRANSACTION_LOGGER_NAME = "RocketmqTransaction";
public static final String REBALANCE_LOCK_LOGGER_NAME = "RocketmqRebalanceLock";
public static final String ROCKETMQ_STATS_LOGGER_NAME = "RocketmqStats";
public static final String COMMERCIAL_LOGGER_NAME = "RocketmqCommercial";
public static final String FLOW_CONTROL_LOGGER_NAME = "RocketmqFlowControl";
public static final String ROCKETMQ_AUTHORIZE_LOGGER_NAME = "RocketmqAuthorize";
public static final String DUPLICATION_LOGGER_NAME = "RocketmqDuplication";
public static final String PROTECTION_LOGGER_NAME = "RocketmqProtection";
public static final String WATER_MARK_LOGGER_NAME = "RocketmqWaterMark";
public static final String FILTER_LOGGER_NAME = "RocketmqFilter";
}