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From Rami Al-Isawi <Rami.Al-Is...@comptel.com>
Subject Re: Problem: Please check that all IDs specified via `uid(String)` are unique.
Date Wed, 03 May 2017 18:21:55 GMT
Hi,

Nope, that is the only uid in the whole project. The “userRawDataStream" comes from a splitter:

public static class Splitter implements OutputSelector<EventRaw>{
    @Override
    public Iterable<String> select(EventRaw value) {
        List<String> output = new ArrayList<>();
        output.add(value.type);
        return output;
    }
}


Any ideas how to get better debug messages?

Regards,

-Rami

On 3 May 2017, at 14:12, Chesnay Schepler <chesnay@apache.org<mailto:chesnay@apache.org>>
wrote:

Hello,

was a uid set on "userRawDataStream", or any of it's parent transformations?

On 03.05.2017 12:59, Rami Al-Isawi wrote:
Hi,

I am trying to set uids. I keep getting this (Flink.1.2):

Exception in thread "main" java.lang.IllegalArgumentException: Hash collision on user-specified
ID. Most likely cause is a non-unique ID. Please check that all IDs specified via `uid(String)`
are unique.

Here is the code snippet.

public DataStream<UserAction> processUserActions(DataStream<UserRaw> userRawDataStream,
Time duration, Sonar.ReportSpan span) {
    return userRawDataStream.map(userRaw->new UserActionValue(userRaw)).startNewChain().uid("111111")
             .keyBy("userRaw.eventRaw.env_key","userRaw.eventRaw.tag","userRaw.eventRaw."+span.name(),"userRaw.type")
            .window(GlobalWindows.create())
            .trigger(new TimedTrigger(duration))
            .sum("count")//.startNewChain().uid("22222222")
            .map(userActionsCount->new UserAction(userActionsCount,span));//.startNewChain().uid("33333333");

}

I made sure that they are unique and even with one uid, the error is there. I guess there
is an easy fix, but I cannot see it.

Regards,

-Rami

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