You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@tez.apache.org by "Siddharth Seth (JIRA)" <ji...@apache.org> on 2015/07/23 20:48:04 UTC
[jira] [Commented] (TEZ-2635) Limit number of attempts being
downloaded in unordered fetch
[ https://issues.apache.org/jira/browse/TEZ-2635?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14639352#comment-14639352 ]
Siddharth Seth commented on TEZ-2635:
-------------------------------------
{code}if (includedMaps++ >= maxTaskOutputAtOnce) {{code}
I think this will end up ignoring the removes done as a result of completedInputs and obsoletedInputs. That should be factored into the counting.
Also, I'm not sure how the host actually makes it back into the pendingQueue. The loop to decide which host to fetch relies upon picking up hosts from 'pendingHosts' - which is not populated back when adding the inputs back to the host.
> Limit number of attempts being downloaded in unordered fetch
> ------------------------------------------------------------
>
> Key: TEZ-2635
> URL: https://issues.apache.org/jira/browse/TEZ-2635
> Project: Apache Tez
> Issue Type: Bug
> Reporter: Rajesh Balamohan
> Assignee: Rajesh Balamohan
> Attachments: TEZ-2635.1.patch, tez2635.tar.gz
>
>
> {noformat}
> 2015-07-22 23:39:14,221 WARN [Fetcher [Map_3] #4] shuffle.Fetcher: Fetch Failure from host while connecting: machine123, attempt: InputAttemptIdentifier [inputIdentifier=InputIdentifier [inputIndex=12], attemptNumber=0, pathComponent=attempt_1437098194051_0178_2_02_000012_0_10003_0, fetchTypeInfo=INCREMENTAL_UPDATE, spillEventId=0] Informing ShuffleManager:
> java.io.IOException: Server returned HTTP response code: 400 for URL: http://machine123:13562/mapOutput?job=job_1437098194051_0178&reduce=279&map=attempt_1437098194051_0178_2_02_000012_0_10003_0,attempt_1437098194051_0178_2_02_000012_0_10003_1,attempt_1437098194051_0178_2_02_000012_0_10003_2,attempt_1437098194051_0178_2_02_000012_0_10003_3,attempt_1437098194051_0178_2_02_000031_0_10006_0,attempt_1437098194051_0178_2_02_000031_0_10006_1,attempt_1437098194051_0178_2_02_000031_0_10006_2,attempt_1437098194051_0178_2_02_000031_0_10006_3,attempt_1437098194051_0178_2_02_000031_0_10006_4,attempt_1437098194051_0178_2_02_000050_0_10009_0,attempt_1437098194051_0178_2_02_000050_0_10009_1,attempt_1437098194051_0178_2_02_000050_0_10009_2,attempt_1437098194051_0178_2_02_000050_0_10009_3,attempt_1437098194051_0178_2_02_000069_0_10012_0,attempt_1437098194051_0178_2_02_000088_0_10033_0,attempt_1437098194051_0178_2_02_000107_0_10033_0,attempt_1437098194051_0178_2_02_000126_0_10006_0,attempt_1437098194051_0178_2_02_000069_0_10012_1,attempt_1437098194051_0178_2_02_000088_0_10033_1,attempt_1437098194051_0178_2_02_000145_0_10006_0,attempt_1437098194051_0178_2_02_000107_0_10033_1,attempt_1437098194051_0178_2_02_000126_0_10006_1,attempt_1437098194051_0178_2_02_000069_0_10012_2,attempt_1437098194051_0178_2_02_000069_0_10012_3,attempt_1437098194051_0178_2_02_000145_0_10006_1,attempt_1437098194051_0178_2_02_000088_0_10033_2,attempt_1437098194051_0178_2_02_000107_0_10033_2,attempt_1437098194051_0178_2_02_000126_0_10006_2,attempt_1437098194051_0178_2_02_000164_0_10030_0,attempt_1437098194051_0178_2_02_000183_0_10006_0,attempt_1437098194051_0178_2_02_000107_0_10033_3,attempt_1437098194051_0178_2_02_000145_0_10006_2,attempt_1437098194051_0178_2_02_000088_0_10033_3,attempt_1437098194051_0178_2_02_000088_0_10033_4,attempt_1437098194051_0178_2_02_000202_0_10015_0,attempt_1437098194051_0178_2_02_000145_0_10006_3,attempt_1437098194051_0178_2_02_000126_0_10006_3,attempt_1437098194051_0178_2_02_000126_0_10006_4,attempt_1437098194051_0178_2_02_000164_0_10030_1,attempt_1437098194051_0178_2_02_000183_0_10006_1,attempt_1437098194051_0178_2_02_000202_0_10015_1,attempt_1437098194051_0178_2_02_000183_0_10006_2,attempt_1437098194051_0178_2_02_000164_0_10030_2,attempt_1437098194051_0178_2_02_000164_0_10030_3,attempt_1437098194051_0178_2_02_000183_0_10006_3,attempt_1437098194051_0178_2_02_000202_0_10015_2,attempt_1437098194051_0178_2_02_000202_0_10015_3,attempt_1437098194051_0178_2_02_000133_0_10036_0,attempt_1437098194051_0178_2_02_000096_0_10012_0,attempt_1437098194051_0178_2_02_000114_0_10009_0,attempt_1437098194051_0178_2_02_000095_0_10009_0,attempt_1437098194051_0178_2_02_000153_0_10041_0,attempt_1437098194051_0178_2_02_000143_0_10036_0,attempt_1437098194051_0178_2_02_000190_0_10015_0,attempt_1437098194051_0178_2_02_000181_0_10042_0,attempt_1437098194051_0178_2_02_000133_0_10036_1,attempt_1437098194051_0178_2_02_000143_0_10036_1,attempt_1437098194051_0178_2_02_000153_0_10041_1,attempt_1437098194051_0178_2_02_000190_0_10015_1,attempt_1437098194051_0178_2_02_000209_0_10018_0,attempt_1437098194051_0178_2_02_000095_0_10009_1,attempt_1437098194051_0178_2_02_000114_0_10009_1,attempt_1437098194051_0178_2_02_000096_0_10012_1,attempt_1437098194051_0178_2_02_000181_0_10042_1,attempt_1437098194051_0178_2_02_000133_0_10036_2,attempt_1437098194051_0178_2_02_000153_0_10041_2,attempt_1437098194051_0178_2_02_000143_0_10036_2,attempt_1437098194051_0178_2_02_000114_0_10009_2,attempt_1437098194051_0178_2_02_000190_0_10015_2,attempt_1437098194051_0178_2_02_000133_0_10036_3,attempt_1437098194051_0178_2_02_000095_0_10009_2,attempt_1437098194051_0178_2_02_000096_0_10012_2,attempt_1437098194051_0178_2_02_000209_0_10018_1,attempt_1437098194051_0178_2_02_000181_0_10042_2,attempt_1437098194051_0178_2_02_000153_0_10041_3,attempt_1437098194051_0178_2_02_000095_0_10009_3,attempt_1437098194051_0178_2_02_000096_0_10012_3,attempt_1437098194051_0178_2_02_000114_0_10009_3,attempt_1437098194051_0178_2_02_000190_0_10015_3,attempt_1437098194051_0178_2_02_000143_0_10036_3,attempt_1437098194051_0178_2_02_000190_0_10015_4,attempt_1437098194051_0178_2_02_000143_0_10036_4,attempt_1437098194051_0178_2_02_000181_0_10042_3,attempt_1437098194051_0178_2_02_000153_0_10041_4,attempt_1437098194051_0178_2_02_000181_0_10042_4,attempt_1437098194051_0178_2_02_000209_0_10018_2,attempt_1437098194051_0178_2_02_000209_0_10018_3&keepAlive=true
> at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1839)
> at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1440)
> at org.apache.tez.http.HttpConnection.getInputStream(HttpConnection.java:248)
> at org.apache.tez.runtime.library.common.shuffle.Fetcher.setupConnection(Fetcher.java:441)
> at org.apache.tez.runtime.library.common.shuffle.Fetcher.doHttpFetch(Fetcher.java:470)
> at org.apache.tez.runtime.library.common.shuffle.Fetcher.doHttpFetch(Fetcher.java:403)
> at org.apache.tez.runtime.library.common.shuffle.Fetcher.callInternal(Fetcher.java:199)
> at org.apache.tez.runtime.library.common.shuffle.Fetcher.callInternal(Fetcher.java:71)
> at org.apache.tez.common.CallableWithNdc.call(CallableWithNdc.java:36)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> {noformat}
> tez.runtime.shuffle.fetch.max.task.output.at.once is provided only for ordered fetch, which defaults to 20. But for unordered case, this is not honored.
> [~gopalv] got this issue when executing "select p.p_partkey, li.l_suppkey from (select distinct l_partkey as p_partkey from lineitem) p join lineitem li on p.p_partkey = li.l_partkey where li.l_linenumber = 1 and li.l_orderkey in (select l_orderkey from lineitem where l_shipmode = 'AIR') limit 2" @ 10 TB scale
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)