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Oracle Linux 7.6 black screen while boot from virtualbox

I am trying to boot my oracle linux 7.6 which is running under virtual box but black screen appear long time


Causes :


Network manager & network manager wait online service have a problem

Solution :

Boot as rescue mode like below

Edit mode (e)

end of line linux16, add below command


control + x  –> enter


Maintenance mode will appear

Enter root password maintenance

Execute below command

systemctl mask systemd-NetworkManager-wait-online.service

reboot the machine

The network manager may have a problem after restarted the machine, so start the network manager like below

systemctl enable NetworkManager

systemctl unmask NetworkManager.service

systemctl start NetworkManager.service


In case selinux may also making issue for black screen appeared while booting. Please disable and reboot the machine.

Error while executing service Service execution error – target name xml-multiple of processing instruction at line {1}

Custom REST web service failed with below errors

Tue Jun 18 17:09:13 AST 2019 : : ServiceExecError: Error while executing service Service execution error – target name xml-multiple of processing instruction at line {1}, column {2} is reserved target name xml-multiple of processing instruction at line {1}, column {2} is reserved
at sun.reflect.GeneratedMethodAccessor49.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(
at java.lang.reflect.Method.invoke(
at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(
at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(
at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(
at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(
at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(
at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(
at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(
at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(
at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(
at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(
at com.sun.jersey.spi.container.servlet.WebComponent.service(
at com.sun.jersey.spi.container.servlet.ServletContainer.service(
at com.sun.jersey.spi.container.servlet.ServletContainer.service(
at javax.servlet.http.HttpServlet.service(
at com.evermind.server.http.ServletRequestDispatcher.invoke(
at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(
at com.evermind.server.http.HttpRequestHandler.doProcessRequest(
at com.evermind.server.http.HttpRequestHandler.processRequest(
at com.evermind.util.ReleasableResourcePooledExecutor$
Tue Jun 18 17:09:13 AST 2019 : : Response Media Type – application/json
Tue Jun 18 17:09:13 AST 2019 : : Error Response –
“ISGServiceFault” : {
“Message” : “Error while executing service”,
“Resolution” : “System error, please see service log trace for details”,
“ServiceDetails” : {
“ServiceName” : “XXACE_REV_SOA_CMS_PKG1”,
“OperationName” : “get_transaction_proc”,
“InstanceId” : “0”

Solution :

Download and apply the Patch 17428617 at Oracle Home (10.1.3) path on Application server using opatch

Custom REST webservice with nested array based package is failing while invoking (Doc ID 2439803.1)