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  1. ,
    via oracle.com by Unknown author

    An easy way to solve OutOfMemoryError in java is to increase the maximum heap size by using JVM options -Xmx512M, this will immediately solve your OutOfMemoryError.

  2. ,
    via Stack Overflow by Eugene Yokota

    In Eclipse : go to Run --> Run Configurations --> then select the project under maven build --> then select the tab "JRE" --> then enter -Xmx1024m.

    This should increase the memory heap for all the builds/projects. The above memory size is 1 GB.

java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.copyOf(Arrays.java:2367) at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:130) at java.lang.AbstractStringBuilder.ensureCapacityInternal(AbstractStringBuilder.java:114) at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:415) at java.lang.StringBuffer.append(StringBuffer.java:237) at java.io.StringWriter.write(StringWriter.java:112) at java.io.PrintWriter.write(PrintWriter.java:456) at java.io.PrintWriter.write(PrintWriter.java:473) at java.io.PrintWriter.print(PrintWriter.java:603) at java.io.PrintWriter.println(PrintWriter.java:756) at java.lang.Throwable$WrappedPrintWriter.println(Throwable.java:764) at java.lang.Throwable.printEnclosedStackTrace(Throwable.java:697) at java.lang.Throwable.printStackTrace(Throwable.java:667) at java.lang.Throwable.printStackTrace(Throwable.java:721) at java.util.logging.SimpleFormatter.format(SimpleFormatter.java:157) at org.apache.juli.FileHandler.publish(FileHandler.java:198) at java.util.logging.Logger.log(Logger.java:616) at java.util.logging.Logger.doLog(Logger.java:641) at java.util.logging.Logger.log(Logger.java:730) at com.sun.faces.context.ExceptionHandlerImpl.log(ExceptionHandlerImpl.java:323) at com.sun.faces.context.ExceptionHandlerImpl.handle(ExceptionHandlerImpl.java:152) at javax.faces.context.ExceptionHandlerWrapper.handle(ExceptionHandlerWrapper.java:100) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:119) at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:219) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:647) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)