src/main/java/org/opensearch/performanceanalyzer/collectors/ClusterApplierServiceStatsCollector.java [78:90]:
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        value = new StringBuilder();
        this.controller = controller;
        this.configOverridesWrapper = configOverridesWrapper;
    }

    @Override
    public void collectMetrics(long startTime) {
        if (!controller.isCollectorEnabled(configOverridesWrapper, getCollectorName())) {
            return;
        }
        try {
            long mCurrT = System.currentTimeMillis();
            if (OpenSearchResources.INSTANCE.getClusterService() == null
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src/main/java/org/opensearch/performanceanalyzer/collectors/MasterThrottlingMetricsCollector.java [67:79]:
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        value = new StringBuilder();
        this.controller = controller;
        this.configOverridesWrapper = configOverridesWrapper;
    }

    @Override
    public void collectMetrics(long startTime) {
        if (!controller.isCollectorEnabled(configOverridesWrapper, getCollectorName())) {
            return;
        }
        try {
            long mCurrT = System.currentTimeMillis();
            if (OpenSearchResources.INSTANCE.getClusterService() == null
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -