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https://issues.apache.org/jira/browse/HBASE-13068?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lars Hofhansl resolved HBASE-13068.
-----------------------------------
Resolution: Cannot Reproduce
Closing this old issue.
> Unexpected client exception with slow scan
> ------------------------------------------
>
> Key: HBASE-13068
> URL: https://issues.apache.org/jira/browse/HBASE-13068
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.98.10.1
> Reporter: Lars Hofhansl
>
> I just came across in interesting exception:
> {code}
> Caused by: java.io.IOException: Call 10 not added as the connection
> newbunny/127.0.0.1:60020/ClientService/lars (auth:SIMPLE)/60000 is closing
> at
> org.apache.hadoop.hbase.ipc.RpcClient$Connection.addCall(RpcClient.java:495)
> at
> org.apache.hadoop.hbase.ipc.RpcClient.getConnection(RpcClient.java:1534)
> at org.apache.hadoop.hbase.ipc.RpcClient.call(RpcClient.java:1442)
> ... 13 more
> {code}
> Called from here:
> {code}
> at
> org.apache.hadoop.hbase.client.ScannerCallable.close(ScannerCallable.java:291)
> at
> org.apache.hadoop.hbase.client.ScannerCallable.call(ScannerCallable.java:160)
> at
> org.apache.hadoop.hbase.client.ScannerCallable.call(ScannerCallable.java:59)
> at
> org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithRetries(RpcRetryingCaller.java:115)
> at
> org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithRetries(RpcRetryingCaller.java:91)
> at
> org.apache.hadoop.hbase.client.ClientScanner.nextScanner(ClientScanner.java:247)
> {code}
> This happened when I scanned with multiple client against a single region
> server when all data is filtered at the server by a filter.
> I had 10 clients, the region server has 30 handles.
> This means the scanners are not getting closed and their lease has to expire.
> The workaround is to increase hbase.ipc.client.connection.maxidletime.
> But it's strange that this *only* happens at close time. And since I am not
> using up all handlers there shouldn't be any starvation.
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