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java.lang.OutOfMemoryError: Java heap space	at org.glassfish.grizzly.memory.HeapMemoryManager.reallocatePoolBuffer(HeapMemoryManager.java:260)	at org.glassfish.grizzly.memory.HeapMemoryManager.allocateHeapBuffer(HeapMemoryManager.java:191)	at org.glassfish.grizzly.memory.HeapMemoryManager.allocate(HeapMemoryManager.java:76)	at org.glassfish.grizzly.memory.HeapMemoryManager.allocate(HeapMemoryManager.java:59)	at org.glassfish.grizzly.http.server.io.OutputBuffer.checkCurrentBuffer(OutputBuffer.java:589)	at org.glassfish.grizzly.http.server.io.OutputBuffer.write(OutputBuffer.java:355)	at org.glassfish.grizzly.http.server.NIOOutputStreamImpl.write(NIOOutputStreamImpl.java:84)	at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:423)	at org.glassfish.grizzly.http.util.ByteChunk.flushBuffer(ByteChunk.java:434)	at org.glassfish.grizzly.http.util.ByteChunk.append(ByteChunk.java:356)	at org.apache.catalina.connector.OutputBuffer.writeBytes(OutputBuffer.java:454)	at org.apache.catalina.connector.OutputBuffer.write(OutputBuffer.java:441)	at org.apache.catalina.connector.CoyoteOutputStream.write(CoyoteOutputStream.java:160)	at org.apache.catalina.servlets.DefaultServlet.copyRange(DefaultServlet.java:2255)	at org.apache.catalina.servlets.DefaultServlet.copy(DefaultServlet.java:1991)	at org.apache.catalina.servlets.DefaultServlet.serveResource(DefaultServlet.java:1013)	at org.apache.catalina.servlets.DefaultServlet.doGet(DefaultServlet.java:439)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:734)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)	at sun.reflect.GeneratedMethodAccessor88.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:323)	at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:321)	at java.security.AccessController.doPrivileged(Native Method)	at javax.security.auth.Subject.doAsPrivileged(Subject.java:517)	at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:356)	at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:212)	at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1556)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:286)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:173)	at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)