storm-server/src/main/java/org/apache/storm/scheduler/resource/strategies/scheduling/sorter/NodeSorterHostProximity.java [460:474]:
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    protected List<String> makeHostToNodeIds(List<String> hosts) {
        if (hosts == null) {
            return Collections.emptyList();
        }
        List<String> ret = new ArrayList<>(hosts.size());
        for (String host: hosts) {
            List<RasNode> nodes = hostnameToNodes.get(host);
            if (nodes != null) {
                for (RasNode node : nodes) {
                    ret.add(node.getId());
                }
            }
        }
        return ret;
    }
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storm-server/src/main/java/org/apache/storm/scheduler/resource/strategies/scheduling/sorter/NodeSorter.java [395:409]:
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    protected List<String> makeHostToNodeIds(List<String> hosts) {
        if (hosts == null) {
            return Collections.emptyList();
        }
        List<String> ret = new ArrayList<>(hosts.size());
        for (String host: hosts) {
            List<RasNode> nodes = hostnameToNodes.get(host);
            if (nodes != null) {
                for (RasNode node : nodes) {
                    ret.add(node.getId());
                }
            }
        }
        return ret;
    }
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