Kevin Minder created KNOX-462:
---------------------------------
Summary: Proper error message when root tag of topology file
incorrect
Key: KNOX-462
URL: https://issues.apache.org/jira/browse/KNOX-462
Project: Apache Knox
Issue Type: Bug
Components: Server
Affects Versions: 0.4.0
Reporter: Kevin Minder
Priority: Critical
Fix For: 0.6.0
When a topology file is well formed XML but the root element is not <topology>
the result is a NullPointerException similar to this at least as it was in the
0.4.0 code line.
{code}
2014-10-30 18:52:20,730 INFO hadoop.gateway
(GatewayServer.java:startGateway(240)) - Starting gateway...
2014-10-30 18:52:21,175 INFO hadoop.gateway (GatewayServer.java:start(336)) -
Loading topologies from directory: /usr/lib/knox/bin/../conf/topologies
2014-10-30 18:52:21,179 DEBUG hadoop.gateway
(FileTopologyProvider.java:loadTopology(93)) - Loading topology file:
/usr/lib/knox/bin/../conf/topologies/HWorksPOC2.xml
2014-10-30 18:52:21,276 ERROR hadoop.gateway
(FileTopologyProvider.java:loadTopologies(143)) - Failed to load topology
/usr/lib/knox/bin/../conf/topologies/HWorksPOC2.xml:
java.lang.NullPointerException
java.lang.NullPointerException
at
org.apache.hadoop.gateway.topology.file.FileTopologyProvider.loadTopologyAttempt(FileTopologyProvider.java:122)
at
org.apache.hadoop.gateway.topology.file.FileTopologyProvider.loadTopology(FileTopologyProvider.java:98)
at
org.apache.hadoop.gateway.topology.file.FileTopologyProvider.loadTopologies(FileTopologyProvider.java:134)
at
org.apache.hadoop.gateway.topology.file.FileTopologyProvider.reloadTopologies(FileTopologyProvider.java:154)
at org.apache.hadoop.gateway.GatewayServer.start(GatewayServer.java:337)
at
org.apache.hadoop.gateway.GatewayServer.startGateway(GatewayServer.java:252)
at org.apache.hadoop.gateway.GatewayServer.main(GatewayServer.java:112)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:622)
at
org.apache.hadoop.gateway.launcher.Invoker.invokeMainMethod(Invoker.java:70)
at org.apache.hadoop.gateway.launcher.Invoker.invoke(Invoker.java:39)
at org.apache.hadoop.gateway.launcher.Command.run(Command.java:101)
at org.apache.hadoop.gateway.launcher.Launcher.run(Launcher.java:69)
at org.apache.hadoop.gateway.launcher.Launcher.main(Launcher.java:46)
{code}
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