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From eribeiro <...@git.apache.org>
Subject [GitHub] zookeeper pull request #205: ZOOKEEPER-2736 Add a connection rate limiter
Date Fri, 24 Mar 2017 02:43:19 GMT
Github user eribeiro commented on a diff in the pull request:

    --- Diff: src/java/main/org/apache/zookeeper/server/NIOServerCnxnFactory.java ---
    @@ -607,9 +618,28 @@ public static ByteBuffer getDirectBuffer() {
         // sessionMap is used by closeSession()
         private final ConcurrentHashMap<Long, NIOServerCnxn> sessionMap =
             new ConcurrentHashMap<Long, NIOServerCnxn>();
    -    // ipMap is used to limit connections per IP
    -    private final ConcurrentHashMap<InetAddress, Set<NIOServerCnxn>> ipMap
    -        new ConcurrentHashMap<InetAddress, Set<NIOServerCnxn>>( );
    +    // ipMap is used to limit connections and connection rate per IP
    +    private final ConcurrentHashMap<InetAddress, IpCnxns> ipMap
    +        = new ConcurrentHashMap<InetAddress, IpCnxns>();
    +    // for each IP, we keep a RateLimiter to limit connection rate,
    +    // as well as a set of connections to limit total number of connections
    +    private static class IpCnxns {
    --- End diff --
    Eventually, we need to implement same logic for NettyServerCnxnFactory so better to up
this class to ServerCnxnFactory or make it a top level class. The former is fine, imho.

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