catalina.log: 24.05.2013 15:33:38 org.apache.tomcat.util.net.JIoEndpoint processSocket SEVERE: Error allocating socket processor java.lang.OutOfMemoryError: unable to create new native thread at java.lang.Thread.start0(Native Method) at java.lang.Thread.start(Thread.java:657) at org.apache.tomcat.util.net.JIoEndpoint$Worker.start(JIoEndpoint.java:513) at org.apache.tomcat.util.net.JIoEndpoint.newWorkerThread(JIoEndpoint.java:744) at org.apache.tomcat.util.net.JIoEndpoint.createWorkerThread(JIoEndpoint.java:723) at org.apache.tomcat.util.net.JIoEndpoint.getWorkerThread(JIoEndpoint.java:757) at org.apache.tomcat.util.net.JIoEndpoint.processSocket(JIoEndpoint.java:789) at org.apache.tomcat.util.net.JIoEndpoint$Acceptor.run(JIoEndpoint.java:355) at java.lang.Thread.run(Thread.java:679)
......................
and
Caused by: java.lang.NoClassDefFoundError: Could not initialize class sun.font.FontManager at sun.java2d.SunGraphicsEnvironment$2.run(SunGraphicsEnvironment.java:179) at java.security.AccessController.doPrivileged(Native Method) at sun.java2d.SunGraphicsEnvironment.(SunGraphicsEnvironment.java:163) at sun.awt.X11GraphicsEnvironment.(X11GraphicsEnvironment.java:253) at sun.reflect.GeneratedConstructorAccessor109.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:532) at java.lang.Class.newInstance0(Class.java:374) at java.lang.Class.newInstance(Class.java:327) at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:82) at java.awt.image.BufferedImage.createGraphics(BufferedImage.java:1152) at javax.media.jai.TiledImageGraphics.getBogusGraphics2D(TiledImageGraphics.java:266) at javax.media.jai.TiledImageGraphics.(TiledImageGraphics.java:192) at javax.media.jai.TiledImage.createGraphics(TiledImage.java:755) at javax.media.jai.ROIShape.getAsImage(ROIShape.java:1148) at com.sun.media.jai.opimage.MosaicOpImage.(MosaicOpImage.java:374) at com.sun.media.jai.mlib.MlibMosaicOpImage.(MlibMosaicOpImage.java:49) at com.sun.media.jai.mlib.MlibMosaicRIF.create(MlibMosaicRIF.java:74)
...................
and more
ERROR [geotools.map] - Call MapContent dispose() to prevent memory leaks
..............
After run layer preview(big imagemosaic) geoserver(and other opengeo) send error 502.