Resolution: When using Java Driver with the 1.4.1_03 JVM, the following hotspot error may occur. This is a known issue with the Java Virtual Machine. To avoid this error, upgrade to a newer version of the JVM. The full hotspot message is as follows: An unexpected exception has been detected in native code outside the VM. Unexpected Signal : 11 occurred at PC=0x4207A6EB Function=(null)+0x4207A6EB Library=java NOTE: We are unable to locate the function name symbol for the error just occurred. Please refer to release documentation for possible reason and solutions. Current Java thread: at java.util.zip.Deflater.init(Native Method) at java.util.zip.Deflater.<init>(Deflater.java:121) at java.util.zip.ZipOutputStream.<init>(ZipOutputStream.java:61) at com.livecluster.util.BasicByteSupport.deflateObj(BasicByteSupport.java:60) at com.livecluster.connection.message.beans.ObjectBean.toBean(ObjectBean.java:37) at com.livecluster.connection.message.beans.ObjectBean.<init>(ObjectBean.java:13) at com.livecluster.driver.admin.AdminImp.send(AdminImp.java:24) at com.livecluster.driver.admin.ServerAdminImp.getVersion(ServerAdminImp.java:20) at com.livecluster.tasklet.Job.checkVersion(Job.java:873) at com.livecluster.tasklet.Job._submit(Job.java:350) at com.livecluster.tasklet.Job.access$0(Job.java:338) at com.livecluster.tasklet.Job$1.run(Job.java:418) at com.livecluster.util.ReusableThreadPool$InternalThread.run(ReusableThreadPool.java:208)