Uh, I am confused now. /tracers/ is the default parent znode that the
Accumulo Tracer process registers itself in. We can also see this is
what was happening with your snippet.
I don't understand how that would not exist. Have you properly
configured ZooKeeper to act as a quorom? (e.g. if you zkCli.sh -server
to your ZK servers individually, do you see a consistent view of ZK?)
You can try to remove the directory in HDFS you configured Accumulo to
use, and re `accumulo init` to get back to an initial state. I'm not
sure how you got into this situation to begin with.
Yamini Joshi wrote:
1.7.2
Best regards,
Yamini Joshi
On Thu, Oct 6, 2016 at 4:17 PM, Josh Elser <[email protected]
<mailto:[email protected]>> wrote:
Hrm, maybe I am looking at a newer version of Accumulo than what
you're using. What version are you on?
Yamini Joshi wrote:
Thank you for replying Josh.
I am getting this error:
Node does not exist: /tracers
I did ls and saw accumulo there. Should I delete that?
When I try to delete accumulo, it gives me a Authentication is
not valid
error.
Best regards,
Yamini Joshi
On Thu, Oct 6, 2016 at 2:57 PM, Josh Elser <[email protected]
<mailto:[email protected]>
<mailto:[email protected] <mailto:[email protected]>>> wrote:
Hi Yamini,
The /tracers node in ZooKeeper was likely initialized
previously
using an Accumulo configuration that has a different value for
instance.secret. You can delete this znode to move forward
if you
have no other Accumulo instance you intend to run on this
ZK instance.
$ $ZOOKEEPER_HOME/bin/zkCli.sh -server m4:2181,m5:2181,m6:2181
> rmr /tracers
You can also set a different value for trace.zookeeper.path in
accumulo-site.xml. After doing this, you can try running a
start-all.sh again to start the tracer.
You also mentioned that the Monitor did not start but did not
include an exception for that service. The error you
included only
shows that the Accumulo Master/TabletServer did not
correctly start
and assign the system tables (accumulo.root and
accumulo.metadata).
Yamini Joshi wrote:
Hello all
I am trying to configure a multinode cluster with
accumulo. I am
using 3
machines with the config as follows:
M4: Hadoop Master/Acc Slave
M5: Accumulo Master/Monitor/Gc
M6: Slave
I have configured zookeeper ensemble on the cluster
with all the 3
nodes. The Hadoop part seems to work fine, I can see
the console
and run
MR jobs easily. I can also see the zookeeper cluster
with M2 as the
leader. My problem is with accumulo, after accumulo init:
bin/accumulo init
which seems to run without any error, after I isuue
the command
bin/start-all.sh
the Monitor process can't start. I am getting this
error in
my tracer log:
[start.Main] ERROR: Thread 'tracer' died.
org.apache.zookeeper.KeeperException$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:304)
at
org.apache.accumulo.tracer.TraceServer.<init>(TraceServer.java:241)
at
org.apache.accumulo.tracer.TraceServer.main(TraceServer.java:346)
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)
And this in my monitor debug log:
Failed to locate tablet for table : !0 row : ~err_\100
I can see that the accumulo dir has been created in the
HDFS.
Can anyone
please guide me set this up? I am attaching my config
files here
(Rest
all the same generated as a result of bin_config file).
Best regards,
Yamini Joshi
