Examples with ConfigurationNodeLabelsProvider org.apache.hadoop.yarn.server.nodemanager.nodelabels.ConfigurationNodeLabelsProvider used on opensource projects

Example 1 with ConfigurationNodeLabelsProvider

use of org.apache.hadoop.yarn.server.nodemanager.nodelabels.ConfigurationNodeLabelsProvider in project hadoop by apache.

the class NodeManager method createNodeLabelsProvider.

protected NodeLabelsProvider createNodeLabelsProvider(Configuration conf) throws IOException {
    NodeLabelsProvider provider = null;
    String providerString = conf.get(YarnConfiguration.NM_NODE_LABELS_PROVIDER_CONFIG, null);
    if (providerString == null || providerString.trim().length() == 0) {
        // Seems like Distributed Node Labels configuration is not enabled
        return provider;
    }
    switch(providerString.trim().toLowerCase()) {
        case YarnConfiguration.CONFIG_NODE_LABELS_PROVIDER:
            provider = new ConfigurationNodeLabelsProvider();
            break;
        case YarnConfiguration.SCRIPT_NODE_LABELS_PROVIDER:
            provider = new ScriptBasedNodeLabelsProvider();
            break;
        default:
            try {
                Class<? extends NodeLabelsProvider> labelsProviderClass = conf.getClass(YarnConfiguration.NM_NODE_LABELS_PROVIDER_CONFIG, null, NodeLabelsProvider.class);
                provider = labelsProviderClass.newInstance();
            } catch (InstantiationException | IllegalAccessException | RuntimeException e) {
                LOG.error("Failed to create NodeLabelsProvider based on Configuration", e);
                throw new IOException("Failed to create NodeLabelsProvider : " + e.getMessage(), e);
            }
    }
    if (LOG.isDebugEnabled()) {
        LOG.debug("Distributed Node Labels is enabled" + " with provider class as : " + provider.getClass().toString());
    }
    return provider;
}