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PORun query cypher on tomcat, error with Scala library
 

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  1. PORun query cypher on tomcat, error with Scala library
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    <p>I'm tring to run a query with cypher in a web app(REST) with tomcat. This code works correctly in a normal java application, but if I run it on the web app with tomcat it returns this error:</p> <pre><code>java.lang.NoClassDefFoundError: scala/ScalaObject </code></pre> <p>if I add a scala-library.jar into project when I deploy on tomcat it return an error "OutOfMemory". Searching on the web, I have increased my JAVA_OPTS from 512M to 2048M but nothing.</p> <p>This is my code to execute my query:</p> <pre><code>ExecutionEngine engine = new ExecutionEngine( graphDb ); ExecutionResult result = engine.execute( query ); </code></pre> <p>It looks like the ExecuteEngine makes use of Scala library and this library conflicts with tomcat. Any suggestions?</p> <p>EDIT:</p> <p>(full stack OOME)</p> <pre><code>16-apr-2012 16.25.10 org.apache.catalina.core.ContainerBase startInternal GRAVE: A child container failed during start java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Java heap space at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222) at java.util.concurrent.FutureTask.get(FutureTask.java:83) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1128) at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:782) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1566) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1556) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:680) Caused by: java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.copyOfRange(Arrays.java:3209) at java.lang.String.&lt;init&gt;(String.java:215) at java.io.DataInputStream.readUTF(DataInputStream.java:644) at java.io.DataInputStream.readUTF(DataInputStream.java:547) at org.apache.tomcat.util.bcel.classfile.ConstantUtf8.&lt;init&gt;(ConstantUtf8.java:48) at org.apache.tomcat.util.bcel.classfile.Constant.readConstant(Constant.java:129) at org.apache.tomcat.util.bcel.classfile.ConstantPool.&lt;init&gt;(ConstantPool.java:60) at org.apache.tomcat.util.bcel.classfile.ClassParser.readConstantPool(ClassParser.java:209) at org.apache.tomcat.util.bcel.classfile.ClassParser.parse(ClassParser.java:119) at org.apache.catalina.startup.ContextConfig.populateJavaClassCache(ContextConfig.java:2156) at org.apache.catalina.startup.ContextConfig.populateJavaClassCache(ContextConfig.java:2139) at org.apache.catalina.startup.ContextConfig.checkHandlesTypes(ContextConfig.java:2077) at org.apache.catalina.startup.ContextConfig.processAnnotationsStream(ContextConfig.java:2034) at org.apache.catalina.startup.ContextConfig.processAnnotationsJar(ContextConfig.java:1923) at org.apache.catalina.startup.ContextConfig.processAnnotationsUrl(ContextConfig.java:1891) at org.apache.catalina.startup.ContextConfig.processAnnotations(ContextConfig.java:1877) at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1270) at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:855) at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:345) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119) at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5161) ... 8 more 16-apr-2012 16.25.11 org.apache.catalina.core.ContainerBase startInternal GRAVE: A child container failed during start java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]] at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222) at java.util.concurrent.FutureTask.get(FutureTask.java:83) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1128) at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:302) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.startup.Catalina.start(Catalina.java:675) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:322) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:450) Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1566) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1556) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:680) Caused by: org.apache.catalina.LifecycleException: A child container failed during start at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1136) at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:782) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ... 7 more 16-apr-2012 16.25.11 org.apache.catalina.startup.Catalina start GRAVE: Catalina.start: org.apache.catalina.LifecycleException: Failed to start component [StandardServer[8005]] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154) at org.apache.catalina.startup.Catalina.start(Catalina.java:675) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:322) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:450) Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardService[Catalina]] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154) at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ... 7 more Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina]] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154) at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ... 9 more Caused by: org.apache.catalina.LifecycleException: A child container failed during start at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1136) at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:302) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ... 11 more 16-apr-2012 16.25.11 org.apache.catalina.startup.Catalina start INFO: Server startup in 13147 ms </code></pre>
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    1. PTQuestion
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    1. USDany
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    1. This table or related slice is empty.
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      1. PORun query cypher on tomcat, error with Scala library
      1. This table or related slice is empty.
      1. VTUpMod
    1. COThere should be no conflicts with Scala and Tomcat. Exactly which version of Apache Tomcat and also post the full stack trace of the OOME.
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      1. PORun query cypher on tomcat, error with Scala library
      1. USMark Thomas
    2. COHow much data are you returning? It could be a huge result building up on the server side ...
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      1. PORun query cypher on tomcat, error with Scala library
      1. USPeter Neubauer
 

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