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Will Stevens 9456aa0e38 Merge pull request #1503 from Amysta/fix-CLOUDSTACK-9358 
CLOUDSTACK-9358: StringIndexOutOfBoundsException on eventsFixes JSON deserialization of `cmdInfo` (current process fails with `StringIndexOutOfBoundsException` when `cmdEventType` is the last parameter in the JSON string).

A `StringIndexOutOfBoundsException` is thrown in some cases during event publication.

Example: a stopVirtualMachine API request is executed, and fails with:

```
2016-04-15 09:24:43,080 ERROR [o.a.c.f.m.MessageDispatcher] (catalina-exec-1:ctx-840cbaa7 ctx-8daf0e9c ctx-f63af073) Unexpected exception when calling com.cloud.api.ApiServer.handleAsyncJobPublishEvent
java.lang.reflect.InvocationTargetException
        at sun.reflect.GeneratedMethodAccessor307.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.cloudstack.framework.messagebus.MessageDispatcher.dispatch(MessageDispatcher.java:75)
        at org.apache.cloudstack.framework.messagebus.MessageDispatcher.onPublishMessage(MessageDispatcher.java:45)
        at org.apache.cloudstack.framework.messagebus.MessageBusBase$SubscriptionNode.notifySubscribers(MessageBusBase.java:441)
        at org.apache.cloudstack.framework.messagebus.MessageBusBase.publish(MessageBusBase.java:178)
        at org.apache.cloudstack.framework.jobs.impl.AsyncJobManagerImpl.publishOnEventBus(AsyncJobManagerImpl.java:1052)
        at org.apache.cloudstack.framework.jobs.impl.AsyncJobManagerImpl.submitAsyncJob(AsyncJobManagerImpl.java:180)
        at org.apache.cloudstack.framework.jobs.impl.AsyncJobManagerImpl.submitAsyncJob(AsyncJobManagerImpl.java:168)
        at com.cloud.api.ApiServer.queueCommand(ApiServer.java:687)
        at com.cloud.api.ApiServer.handleRequest(ApiServer.java:528)
        at com.cloud.api.ApiServlet.processRequestInContext(ApiServlet.java:296)
        at com.cloud.api.ApiServlet$1.run(ApiServlet.java:127)
        at org.apache.cloudstack.managed.context.impl.DefaultManagedContext$1.call(DefaultManagedContext.java:56)
        at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.callWithContext(DefaultManagedContext.java:103)
        at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.runWithContext(DefaultManagedContext.java:53)
        at com.cloud.api.ApiServlet.processRequest(ApiServlet.java:124)
        at com.cloud.api.ApiServlet.doGet(ApiServlet.java:86)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1720)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1679)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.StringIndexOutOfBoundsException: String index out of range: -468
        at java.lang.String.substring(String.java:1967)
        at com.cloud.api.ApiServer.handleAsyncJobPublishEvent(ApiServer.java:270)
        at sun.reflect.GeneratedMethodAccessor307.invoke(Unknown Source)
        ... 41 more
```

The VM is not stopped, and the API returns the following error:

      HTTP/1.1 530 : InvocationTargetException when invoking event handler for subject: job.eventpublish

The error comes from JSON parsing in 339355594c/server/src/com/cloud/api/ApiServer.java (L270)

The `substring()` method throws a StringIndexOutOfBoundsException when `cmdEventType` is the last field in the JSON object.

The JSON object being the JSON serialization of a `HashMap` object, the order of the fields is not guaranteed. In my tests, I observed that there is no error with Java 7, but it fails with Java 8, which has a different Hashmap implementation.

For example, with request http://127.0.0.1:8096/client/api?command=stopVirtualMachine&id=734ef752-fe99-4d46-8f31-18130496473c, cmdInfo is:

```
{"ctxUserId":"1","httpmethod":"GET","ctxStartEventId":"105","id":"734ef752-fe99-4d46-8f31-18130496473c","ctxDetails":"{\"interface com.cloud.vm.VirtualMachine\":\"734ef752-fe99-4d46-8f31-18130496473c\"}","ctxAccountId":"1","uuid":"734ef752-fe99-4d46-8f31-18130496473c","cmdEventType":"VM.STOP"}
```

and it fails.

Please note that the error is not present for all API requests, depending on the parameters fields.

* pr/1503:
  CLOUDSTACK-9358: StringIndexOutOfBoundsException on events

Signed-off-by: Will Stevens <williamstevens@gmail.com>
 		2016-05-25 22:56:18 -04:00
..
conf Remove extraneous log directory and add catalina.out log rotation 2016-05-12 08:41:39 +01:00
resources CLOUDSTACK-9299: Out-of-band Management for CloudStack 2016-05-12 11:05:40 +05:30
scripts License header updates for the server folder. 2012-08-03 09:41:27 -04:00
src Merge pull request #1503 from Amysta/fix-CLOUDSTACK-9358 2016-05-25 22:56:18 -04:00
test Bug-ID: CLOUDSTACK-8870: Skip external device usage collection if no external devices exist 2016-05-23 15:23:23 +05:30
pom.xml maven: Fix jstl version usage 2016-05-11 09:58:27 +05:30