[GraphHopper] GraphHopper + Genymotion mounted shared folder

[emux]

Hi Peter,

I use the various Genymotion VMs for debugging Android apps.
These VMs have the very useful feature 'Shared folders'.
i.e. at VirtualBox VM's settings you can define a shared folder from host OS
and see it inside the Android environment as mounted read/write folder.

This can be help a lot during testing large mapsforge maps or GH graphs.
They can remain at host OS disk and not needed to copy them to device / 
emulator sdcard.
With the Mapsforge map library this feature works fine.

But when I try loading a graph that exists at this read/write mounted 
folder the following exceptions are thrown:

Couldn't map buffer 0 of 31 at position 100 for 32505756 bytes with 
offset 100, new fileLength:32505956
java.lang.RuntimeException: Couldn't map buffer 0 of 31 at position 100 
for 32505756 bytes with offset 100, new fileLength:32505956
     at 
com.graphhopper.storage.MMapDataAccess.mapIt(MMapDataAccess.java:159)
     at 
com.graphhopper.storage.MMapDataAccess.loadExisting(MMapDataAccess.java:241)
     at 
com.graphhopper.storage.GraphHopperStorage.loadExisting(GraphHopperStorage.java:1355)
     at com.graphhopper.GraphHopper.load(GraphHopper.java:670)
     ...
Caused by: java.io.IOException: mmap failed: EINVAL (Invalid argument)
     at java.nio.MemoryBlock.mmap(MemoryBlock.java:119)
     at java.nio.FileChannelImpl.map(FileChannelImpl.java:253)
     at 
com.graphhopper.storage.MMapDataAccess.newByteBuffer(MMapDataAccess.java:177)
     at 
com.graphhopper.storage.MMapDataAccess.mapIt(MMapDataAccess.java:151)
     ... 14 more
Caused by: libcore.io.ErrnoException: mmap failed: EINVAL (Invalid argument)
     at libcore.io.Posix.mmap(Native Method)
     at libcore.io.ForwardingOs.mmap(ForwardingOs.java:94)
     at java.nio.MemoryBlock.mmap(MemoryBlock.java:116)
     ... 17 more


-- 
Emux
Cruiser <http://wiki.openstreetmap.org/wiki/Cruiser> - Atlas 
<http://wiki.openstreetmap.org/wiki/Atlas_%28navigation_application%29>
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