如何抑制Hazelcast Management Center的重复日志输出？

问题背景 #

Tomcat的catalina.out中持续输出以下Hazelcast INFO级日志，尝试设置System.setProperty("hazelcast.mc.log.level", "ERROR");未生效：

2023-03-19 15:36:17,376 [ INFO] [DisabledLoginCleanupThread] [c.h.w.s.s.i.DisableLoginStrategy]: Starting scheduled disabled login cleanup.
2023-03-19 15:36:17,376 [ INFO] [DisabledLoginCleanupThread] [c.h.w.s.s.i.DisableLoginStrategy]: Finished scheduled disabled login cleanup.
2023-03-19 15:36:17,942 [ INFO] [MetricsStorageDiagnostics] [c.h.w.s.m.MetricsStorageDiagnosticsLogger]: 

Known time series: 138,514
Tracked minute buckets: 35,312
Number of persistence runs: 360
Total persistence run time: 00:00:11.060
Max persistence run time: 00:00:00.399
Average persistence run time: 00:00:00.030
Last hour average persistence run time: 00:00:00.030
Total persisted minute buckets: 2,110,910
Max persisted minute buckets per run: 35,312
Average persisted minute buckets per run: 5,863
Last hour average persisted minute buckets per run: 5,863
Total dropped data points that arrived when the target minute bucket is no longer tracked, but not yet released(persisted) : 0
Total evicted dangling minute series : 0
Persistent store TTL: 24:00:00
Persistent store size on disk: 538.4 MiB
Data point memory compression ratio: 41.65

解决方案 #

1. 针对日志框架配置（推荐） #

这些日志来自com.hazelcast.web.sessions.session.impl.DisableLoginStrategy和com.hazelcast.web.sessions.metrics.MetricsStorageDiagnosticsLogger两个类，直接在项目的日志配置文件中针对这两个类设置ERROR级别即可：

若使用Logback（logback.xml）：

<logger name="com.hazelcast.web.sessions.session.impl.DisableLoginStrategy" level="ERROR"/>
<logger name="com.hazelcast.web.sessions.metrics.MetricsStorageDiagnosticsLogger" level="ERROR"/>

若使用Log4j2（log4j2.xml）：

<Logger name="com.hazelcast.web.sessions.session.impl.DisableLoginStrategy" level="ERROR" additivity="false">
    <AppenderRef ref="YourAppenderName"/>
</Logger>
<Logger name="com.hazelcast.web.sessions.metrics.MetricsStorageDiagnosticsLogger" level="ERROR" additivity="false">
    <AppenderRef ref="YourAppenderName"/>
</Logger>

2. Hazelcast核心配置调整 #

在hazelcast.xml或hazelcast.yaml中指定日志级别，确保日志桥接至SLF4J（与项目日志框架对齐）：

<hazelcast>
    <logging type="slf4j"/>
    <properties>
        <property name="hazelcast.logging.level">ERROR</property>
    </properties>
    <!-- 或针对特定包细化配置 -->
    <logger name="com.hazelcast.web.sessions" level="ERROR"/>
</hazelcast>

3. Tomcat全局日志配置 #

若需在Tomcat层面控制，修改conf/logging.properties，添加：

com.hazelcast.web.sessions.session.impl.DisableLoginStrategy.level = SEVERE
com.hazelcast.web.sessions.metrics.MetricsStorageDiagnosticsLogger.level = SEVERE

无效原因说明 #

hazelcast.mc.log.level属性仅对独立部署的Hazelcast Management Center生效，而当前是在Tomcat中集成Hazelcast相关模块，因此该属性无法作用于这些日志输出。

内容的提问来源于stack exchange，提问作者Robert Yeager