Github user jvwing commented on the issue:
https://github.com/apache/nifi/pull/583
@mcgilman - I fixed two issues that you pointed out:
1. The About dialog no longer shows the "Tagged" label when there is
nothing in nifi.properties
2. I added "(not available)" to the System Diagnostics properties with the
"unset" style where info is not provided in nifi.properties
Then I did some testing that I should have done last time, with these four
typical scenarios for data combinations in nifi.properties:
1.) Build from source release, screenshots:
[About](https://cloud.githubusercontent.com/assets/3151078/19955878/3a4c8cc0-a143-11e6-9c42-568d57f026b5.png)
| [System
Diagnostics](https://cloud.githubusercontent.com/assets/3151078/19955879/3a4fb8e6-a143-11e6-8e4e-bd0b190d1b86.png)
```
# Build info
nifi.build.tag=nifi-1.1.0-RC-test
nifi.build.branch=
nifi.build.revision=
nifi.build.timestamp=2016-11-02T21:32:02Z
```
2.) SNAPSHOT Build from git repo, screenshots:
[About](https://cloud.githubusercontent.com/assets/3151078/19955880/3a55946e-a143-11e6-9804-4f2249fb869c.png)
| [System
Diagnostics](https://cloud.githubusercontent.com/assets/3151078/19955883/3a58ca76-a143-11e6-9a68-40fdd9b4f23f.png)
```
# Build info
nifi.build.tag=HEAD
nifi.build.branch=NIFI-2115-about-box-info-2
nifi.build.revision=7057cfc
nifi.build.timestamp=2016-10-24T18:21:35Z
```
3.) Build from non-release source without git, screenshots:
[About](https://cloud.githubusercontent.com/assets/3151078/19955881/3a55bf8e-a143-11e6-8988-498f6dee50e7.png)
| [System
Diagnostics](https://cloud.githubusercontent.com/assets/3151078/19955882/3a5610a6-a143-11e6-9f61-2313855fa812.png)
```
# Build info
nifi.build.tag=HEAD
nifi.build.branch=
nifi.build.revision=
nifi.build.timestamp=2016-11-02T18:57:11Z
```
4.) Upgrade - nothing in nifi.properties, screenshots:
[About](https://cloud.githubusercontent.com/assets/3151078/19955885/3a639e60-a143-11e6-9637-362461480b80.png)
| [System
Diagnostics](https://cloud.githubusercontent.com/assets/3151078/19955884/3a639b2c-a143-11e6-827d-55c94988a4b6.png)
I know this isn't an exhaustive list, I believe arbitrary combinations
should now be more gracefully supported.
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