[GraphHopper] Shortest route failed (ferry issue?)

[Peter]

Hi Martin,

hmmh, if the speed is somehow calculated to be 0 then the access should
be set to false making the ferry no longer available. And if the speed
is not 0 then the exception should not be thrown.

Additionally in this case I see that the unknownSpeed *should* be
selected but it should be 5km/h (living_street):
https://github.com/graphhopper/graphhopper/blob/master/core/src/main/java/com/graphhopper/routing/util/AbstractFlagEncoder.java#L512

https://github.com/graphhopper/graphhopper/blob/master/core/src/main/java/com/graphhopper/routing/util/CarFlagEncoder.java#L283

Maybe you can debug this a bit and tell if the speed of the edge is 0 or
not and why.

Also when switching branches make sure you remove the target folders
and/or rebuild in your IDE.

Regards,
Peter

On 10.07.2015 18:35, Martin Sauvage wrote:
> Hi,
>
> I tried on master and I still got the same illegal state exception, so
> apparently ZhiQiang fix doesn't solve the problem (is it a ferry link
> only issue?).
> Any idea?
>
> Thanks,
> Martin
>
>
>
> 2015-07-10 10:50 GMT+02:00 Peter <graphhopper at gmx.de
> <mailto:graphhopper at gmx.de>>:
>
>     Hi Martin, Hi ZhiQiang,
>
>     this could be related to the bug ZhiQiang mentioned but this was
>     already fixed:
>     https://github.com/graphhopper/graphhopper/issues/367
>
>     This can only occur for shortest path routing:
>     https://github.com/graphhopper/graphhopper/issues/242
>
>     Martin, do you use master or a 0.4 branch?
>
>     Regards,
>     Peter
>
>     On 09.07.2015 19:46, John Zhao wrote:
>>     Hi Martin,
>>
>>     I have face the same problem.
>>     At last I found it caused by maxspeed=3 in the osm data.
>>     carFlagEncoder use 5 as factor of speed encoding.
>>     every number below 5 will be convert to 0.
>>
>>     Then you will have some edges in the graph with speed=0. 
>>
>>     *Best Regards,*
>>     *ZhiQiang ZHAO*
>>
>>     On Thu, Jul 9, 2015 at 5:20 AM, Martin Sauvage
>>     <martin.sauvage at gmail.com <mailto:martin.sauvage at gmail.com>> wrote:
>>
>>         Hello,
>>
>>         I'm facing an issue when routing with shortest path between
>>         these 2 GPS points:
>>         47.194150,-1.676384
>>         47.197470,-1.671832
>>
>>         Caused by: java.lang.IllegalStateException: Speed cannot be 0
>>         for unblocked edge, use access properties to mark edge
>>         blocked! Should only occur for shortest path calculation. See
>>         #242.
>>
>>         I suspect the shortest route tries to take the ferry (Bac
>>         Indret) with no defined speed while the fastest route provides:
>>         https://graphhopper.com/maps/?point=47.19415%2C-1.676384&point=47.19747%2C-1.671832&locale=fr-FR&layer=Lyrk
>>
>>         Is it a GH bug or an OSM data issue? Is there any way to fix
>>         this crash (do not take ferry with shortest route) ?
>>
>>         Thanks,
>>         Martin
>>
>

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