[ https://issues.apache.org/jira/browse/HBASE-13068?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)