| [udig-devel] RC2 Rendering Problem UDIG-391 and GEOT-156 the complete message |
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Sorry the half the last email was missing Hi RC2 seems to have developed a rendering problem: !MESSAGE java.lang.Exception: Exception rendering layer org.geotools.map.DefaultMapLayer@50d7c5 net.refractions.udig.project.render.RenderException: java.lang.Exception: Exception rendering layer org.geotools.map.DefaultMapLayer@50d7c5 Caused by: java.io.IOException: Not enough storage is available to process this command at sun.nio.ch.FileChannelImpl.map0(Native Method) when zooming in on Victoria on Geobase - National Road Network, Canada BC OK on RC1 sorry I take that back, the test was on a 64 bit Sun box, this problem was originally reported in UDIG-391 and in GEOT-156 where I think the proposed fix was to change the point at which the loader changed from memory mapped to virtual, is this the way to go? . In 32 bit Windows you have 4G of virtual space per process half of which taken up by the OS. The remaining is reduced by the VM and the application. If you set your heap to 1 GB or more, running out of address space is inevitable, when the heap size plus the mapped file size exceeds 1.5 GB you will get a Not enough storage is
available to process this command exception, Using the
techniques as coded the only solution would be to use a 64-bit
processor and operating system.We are currently working on this and associated rendering speed problems, using our own databuffering and bytebuffering techniques, and in a separate work stream a swt opengl solution, the code is functional but incomplete at the moment, but we can currently render both shape and GML files for the Canadian road network (from Geobase) in approx 4 to 6 sec for the complex files NRNC1_BC, NRNC1_AB, NRNC1_SK, NRNC1_MB, and can load and render the complete Canadian road network on a Toshiba.Qosmio Laptop with 512 memory. This puts uDig within range of the commercial opposition and cures one of the main complaints of our user groups. On a completely different tack I'm being asked by the user groups if you are going to offer commercial support and if so who do they contact Tony Kennedy |