Github user rgs1 commented on a diff in the pull request:

    https://github.com/apache/zookeeper/pull/117#discussion_r90490925
  
    --- Diff: 
src/java/main/org/apache/zookeeper/server/persistence/FileTxnSnapLog.java ---
    @@ -165,8 +165,22 @@ public File getSnapDir() {
          */
         public long restore(DataTree dt, Map<Long, Integer> sessions,
                 PlayBackListener listener) throws IOException {
    -        snapLog.deserialize(dt, sessions);
    +        long deserializeResult = snapLog.deserialize(dt, sessions);
             FileTxnLog txnLog = new FileTxnLog(dataDir);
    +        if (-1L == deserializeResult) {
    +            /* this means that we couldn't find any snapshot, so we need to
    +             * initialize an empty database */
    --- End diff --
    
    nit: can you add a reference to ZOOKEEPER-2325 here?


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