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From "Pushkar Raste (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SOLR-9207) PeerSync recovery failes if number of updates requested is high
Date Tue, 05 Jul 2016 17:46:11 GMT

     [ https://issues.apache.org/jira/browse/SOLR-9207?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Pushkar Raste updated SOLR-9207:
--------------------------------
    Attachment: SOLR-9207.patch_updated

> PeerSync recovery failes if number of updates requested is high
> ---------------------------------------------------------------
>
>                 Key: SOLR-9207
>                 URL: https://issues.apache.org/jira/browse/SOLR-9207
>             Project: Solr
>          Issue Type: Bug
>    Affects Versions: 5.1, 6.0
>            Reporter: Pushkar Raste
>            Assignee: Shalin Shekhar Mangar
>            Priority: Minor
>         Attachments: SOLR-9207.patch, SOLR-9207.patch_updated
>
>
> {{PeerSync}} recovery fails if we request more than ~99K updates. 
> If update solrconfig to retain more {{tlogs}} to leverage https://issues.apache.org/jira/browse/SOLR-6359
> During out testing we found out that recovery using {{PeerSync}} fails if we ask for
more than ~99K updates, with following error
> {code}
>  WARN  PeerSync [RecoveryThread] - PeerSync: core=hold_shard1 url=<shardUrl>
> exception talking to <leaderUrl>, failed
> org.apache.solr.client.solrj.impl.HttpSolrServer$RemoteSolrException: Expected mime type
application/octet-stream but got application/xml. 
> <?xml version="1.0" encoding="UTF-8"?>
> <response>
> <lst name="error"><str name="msg">application/x-www-form-urlencoded content
length (4761994 bytes) exceeds upload limit of 2048 KB</str><in
> t name="code">400</int></lst>
> </response>
> {code}
> We arrived at ~99K with following match
> * max_version_number = Long.MAX_VALUE = 9223372036854775807  
> * bytes per version number =  20 (on the wire as POST request sends version number as
string)
> * additional bytes for separator ,
> * max_versions_in_single_request = 2MB/21 = ~99864
> I could think of 2 ways to fix it
> 1. Ask for about updates in chunks of 90K inside {{PeerSync.requestUpdates()}}
> 2. Use application/octet-stream encoding 



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