Method TaskId

server/src/main/java/org/elasticsearch/tasks/TaskId.java:42–48

(String nodeId, long id)

    private final long id;

    public TaskId(String nodeId, long id) {
        if (nodeId.isEmpty()) {
            throw new IllegalArgumentException("0 length nodeIds are reserved for EMPTY_TASK_ID and are otherwise invalid.");
        }
        this.nodeId = nodeId;
        this.id = id;
    }

    /**
     * Builds {@link #EMPTY_TASK_ID}.