Christopher Tubbs commented on ACCUMULO-4415:

I'm not sure we can do anything about this right now. It's not really safe for 
ChangeSecret to change /tracers (because that could be in use by more than one 
cluster). Maybe we should just document it as a known issue until we decide 
where the tracer service is ultimately going to live.

> Tracer requires instance.secret
> -------------------------------
>                 Key: ACCUMULO-4415
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-4415
>             Project: Accumulo
>          Issue Type: Bug
>          Components: trace
>            Reporter: Christopher Tubbs
>             Fix For: 1.8.1
> Tracer incorrectly uses instance.secret for its /tracers area in ZooKeeper.
> The tracer does not use the Accumulo system credentials, and instead uses a 
> specific tracer username and password. It should also not use the 
> instance.secret (which is for the system credentials).
> A side effect of this bug is that ChangeSecret does not update the /tracers 
> ACLs in ZooKeeper, preventing the tracer from working entirely after the 
> instance.secret is changed.
> The following error will be seen in the monitor after the ChangeSecret tool 
> is run.
> {code}
> Thread 'tracer' died.
>       org.apache.zookeeper.KeeperException$NoAuthException: KeeperErrorCode = 
> NoAuth for /tracers/trace-
>               at 
> org.apache.zookeeper.KeeperException.create(KeeperException.java:113)
>               at 
> org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
>               at org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:783)
>               at 
> org.apache.accumulo.fate.zookeeper.ZooUtil.putEphemeralSequential(ZooUtil.java:464)
>               at 
> org.apache.accumulo.fate.zookeeper.ZooReaderWriter.putEphemeralSequential(ZooReaderWriter.java:99)
>               at 
> org.apache.accumulo.tracer.TraceServer.registerInZooKeeper(TraceServer.java:318)
>               at 
> org.apache.accumulo.tracer.TraceServer.<init>(TraceServer.java:255)
>               at 
> org.apache.accumulo.tracer.TraceServer.main(TraceServer.java:360)
>               at 
> org.apache.accumulo.tracer.TracerExecutable.execute(TracerExecutable.java:33)
>               at org.apache.accumulo.start.Main$1.run(Main.java:120)
>               at java.lang.Thread.run(Thread.java:745)
> {code}
> This affects at least the current 1.8 branch (1.8.0-SNAPSHOT), but I haven't 
> checked earlier versions.

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