FAQ
Hi,

After I set "statestore_subscriber_timeout_seconds" to 60sec,
now it's working without reconnection messages.

But, there is still something wrong.
I query with the following parameter,

impala > set NUM_SCANNER_THREADS=8;

but, impala-server still scans files with one thread.
It used to work fine.
Is there still commucation problem between statestore and impala-server ?
Do you have any idea what is going on ?

Thanks,

Hiro

2014年1月6日月曜日 21時53分41秒 UTC+9 hiro:
Hi,

I am using Impala 1.2.3 on CDH4.
I installed impala before and I have run several queries successfully.
I just started Impala again after a while and
I get errors like the following when I query.

------------------
[impalad003:21000] > select * from part where p_retailprice <= 900.18;
Query: select * from part where p_retailprice <= 900.18
ERROR: Cancelled due to unreachable impalad(s): impalad006:22000,
impalad063:22000, impalad015:22000, impalad100:22000, ...
ERROR: Invalid query handle
------------------

There seems some connection problems.
I also checked impalad.INFO in each impalad node,
it keeps reconnecting to state-store over and over and never stops as
shown below.
As far as I know, it wasn't like this before, so it might be the cause.

------------------
I0106 21:46:07.333633 32072 state-store-subscriber.cc:202]
impalad002:22000: Connection with state-store lost, entering recovery mode
I0106 21:46:07.333675 32072 state-store-subscriber.cc:206] Trying to
re-register with state-store, attempt: 1
I0106 21:46:07.336510 32072 state-store-subscriber.cc:210] Reconnected to
state-store. Exiting recovery mode
I0106 21:46:17.338811 32072 state-store-subscriber.cc:202]
impalad002:22000: Connection with state-store lost, entering recovery mode
I0106 21:46:17.338851 32072 state-store-subscriber.cc:206] Trying to
re-register with state-store, attempt: 1
I0106 21:46:17.339157 32072 state-store-subscriber.cc:210] Reconnected to
state-store. Exiting recovery mode
W0106 21:46:24.055603 320 Configuration.java:2227]
org.apache.hadoop.hive.conf.LoopingByteArrayInputStream@a1e5879:an attempt
to override final parameter:
mapreduce.job.end-notification.max.retry.interval; Ignoring.
W0106 21:46:24.056337 320 Configuration.java:2227]
org.apache.hadoop.hive.conf.LoopingByteArrayInputStream@a1e5879:an attempt
to override final parameter: mapreduce.job.end-notification.max.attempts;
Ignoring.
I0106 21:46:42.344254 32072 state-store-subscriber.cc:202]
impalad002:22000: Connection with state-store lost, entering recovery mode
I0106 21:46:42.344295 32072 state-store-subscriber.cc:206] Trying to
re-register with state-store, attempt: 1
I0106 21:46:42.344761 32072 state-store-subscriber.cc:210] Reconnected to
state-store. Exiting recovery mode
I0106 21:46:52.346424 32072 state-store-subscriber.cc:202]
impalad002:22000: Connection with state-store lost, entering recovery mode
I0106 21:46:52.346465 32072 state-store-subscriber.cc:206] Trying to
re-register with state-store, attempt: 1
I0106 21:46:52.347231 32072 state-store-subscriber.cc:210] Reconnected to
state-store. Exiting recovery mode
W0106 21:47:03.134521 325 Configuration.java:2227]
org.apache.hadoop.hive.conf.LoopingByteArrayInputStream@6d347991:an attempt
to override final parameter:
mapreduce.job.end-notification.max.retry.interval; Ignoring.
W0106 21:47:03.135227 325 Configuration.java:2227]
org.apache.hadoop.hive.conf.LoopingByteArrayInputStream@6d347991:an attempt
to override final parameter: mapreduce.job.end-notification.max.attempts;
Ignoring.
... (never stops)
------------------

Does anyone have any idea about this ?
Thanks in advance.


Hiro

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postedJan 18, '14 at 2:06p
activeJan 19, '14 at 3:30a
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