[jira] [Created] (NIFI-1746) NiFi will not start when 'conf' directory is a symbolic link

["Michael Moser (JIRA)" <ji...@apache.org>]

Michael Moser created NIFI-1746:
-----------------------------------

             Summary: NiFi will not start when 'conf' directory is a symbolic link
                 Key: NIFI-1746
                 URL: https://issues.apache.org/jira/browse/NIFI-1746
             Project: Apache NiFi
          Issue Type: Bug
          Components: Core Framework
    Affects Versions: 0.6.0
            Reporter: Michael Moser
            Assignee: Michael Moser
            Priority: Trivial


Yes this case is probably rare, but people try many things to make upgrading NiFi easier for themselves.  When the directory containing the flow.xml.gz (nifi.properties nifi.flow.configuration.file=./conf/flow.xml.gz) is actually a symbolic link to another directory AND the flow.xml.gz doesn't yet exist in that directory, then NiFi throws an exception and fails to start.

2016-04-08 13:14:54,239 WARN [main] org.eclipse.jetty.webapp.WebAppContext Failed startup of context o.e.j.w.WebAppContext@a407e8f{/
nifi-api,file:/local/mosermw/nifi-0.6.1/work/jetty/nifi-web-api-0.6.1.war/webapp/,STARTING}{./work/nar/framework/nifi-framework-nar-
0.6.1.nar-unpacked/META-INF/bundled-dependencies/nifi-web-api-0.6.1.war}
org.apache.nifi.web.NiFiCoreException: Unable to start Flow Controller.
...
Caused by: java.nio.file.FileAlreadyExistsException: ./conf
	at sun.nio.fs.UnixException.translateToIOException(UnixException.java:88) ~[na:1.7.0_80]
	at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102) ~[na:1.7.0_80]
	at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107) ~[na:1.7.0_80]
	at sun.nio.fs.UnixFileSystemProvider.createDirectory(UnixFileSystemProvider.java:383) ~[na:1.7.0_80]
	at java.nio.file.Files.createDirectory(Files.java:630) ~[na:1.7.0_80]
	at java.nio.file.Files.createAndCheckIsDirectory(Files.java:734) ~[na:1.7.0_80]
	at java.nio.file.Files.createDirectories(Files.java:683) ~[na:1.7.0_80]
	at org.apache.nifi.persistence.StandardXMLFlowConfigurationDAO.<init>(StandardXMLFlowConfigurationDAO.java:56) ~[nifi-framew
ork-core-0.6.1.jar:0.6.1]
	at org.apache.nifi.controller.StandardFlowService.<init>(StandardFlowService.java:167) ~[nifi-framework-core-0.6.1.jar:0.6.1
]
	at org.apache.nifi.controller.StandardFlowService.createStandaloneInstance(StandardFlowService.java:131) ~[nifi-framework-co
re-0.6.1.jar:0.6.1]
	at org.apache.nifi.spring.StandardFlowServiceFactoryBean.getObject(StandardFlowServiceFactoryBean.java:63) ~[nifi-framework-
core-0.6.1.jar:0.6.1]




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