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Martin Hope
null
Asked: 2016-06-17 03:05:28 +0800 CST
  • 3

I've been trying to get to the bottom of a memory issues for some time now and I simply can't fathom out what the problem is. Any help is greatly appreciated.

The error is:

[![OpenJDK 64-Bit Server VM warning: INFO: os::commit_memory(0x00000005662c0000, 10632822784, 0) failed; error='Cannot allocate memory' (errno=12)
# There is insufficient memory for the Java Runtime Environment to continue.
# Native memory allocation (malloc) failed to allocate 10632822784 bytes for committing reserved memory.]

I have a very small spark job that I'm running on a cluster. Of the various permutations that I've run these are my findings: (new clusters in each case, all identical in configuration)

CLI ONLY - One cluster I start and run all of the steps via the cli, each step results in a slight increase in memory that persists, Ganglia shows the cluster cache memory increasing with every step, it drops again after completion but not to the base level. Eventually resulting in there not being enough memory to allocate for a new JVM to run any additional steps. using htop on this cluster shows spark history servers the main memory intensive process - could the history server be retaining too much information?

CONSOLE ONLY - This cluster was created in very much the same way as the others, the difference is that I add the steps via the console. (I came to try this as I was simply out of ideas) This cluster has only run one step thus far, htop showing oozie as being the highest memory consuming process.

Others - All other clusters ran and failed in the same manner, an interesting case is where a new cluster was started, one step ran, it completed but gradually consumed memory to the point where the exception occurred again. For all of these other clusters, hadoop was always the task at the top of the process tree for memory consumption.

Any help or suggestions with respect to how to solve would be fantastic, thank you in advance.

I've attached a few images that may help explain the above.

enter image description here enter image description here

apache-spark
Martin Hope
null
Asked: 2014-03-07 11:48:33 +0800 CST
  • 0

I'm trying to set up my server properly so that I can run servlets on it with the help from Jenkins. Within the webapps folder are two war files. One for jenkins and one for the sample from apache. Both work fine but when trying to access localhost:8080 I get an HTTP 500 error.

I first discovered the error as I was trying to get a spring web app to deploy. All have so far failed although if I run the web app on my laptop it works fine so I'm assuming that the war file and the web app itself are fine.

Is there a possibility that the previous war files that I tried to deploy have caused a problem somewhere?

The laptop does not have jenkns installed - could jenkins be causing the problem?

I searched various posts and tried to find the jar file within other folders within the webapp directory but could find nothing. I then deleted all of the war files with the exception of jenkins. Jenkins loads but the main page does not.

Thanks for any help.

The full error message is:

HTTP Status 500 - java.lang.ClassCastException: org.apache.jasper.runtime.ELContextImpl cannot be cast to org.apache.jasper.el.ELContextImpl
type Exception report

message java.lang.ClassCastException: org.apache.jasper.runtime.ELContextImpl cannot be cast to org.apache.jasper.el.ELContextImpl

description The server encountered an internal error that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: java.lang.ClassCastException:      org.apache.jasper.runtime.ELContextImpl cannot be cast to org.apache.jasper.el.ELContextImpl
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:549)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:470)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    root cause

   java.lang.ClassCastException: org.apache.jasper.runtime.ELContextImpl cannot be cast to     org.apache.jasper.el.ELContextImpl
org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:1023)
org.apache.jsp.index_jsp._jspService(index_jsp.java:85)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
 note The full stack trace of the root cause is available in the Apache Tomcat/7.0.42 logs.

When I received this message when trying to deploy the webapp (the one that works on laptop), the error line was where jstl was used but in this instance the webapp is no longer on the server and I'm just trying to access localhost.

web-server