[
https://issues.apache.org/jira/browse/HBASE-15198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15131613#comment-15131613
]
Anoop Sam John commented on HBASE-15198:
----------------------------------------
bq.Is this retries from the client, or retries within batchMutate() ->
doMiniBatchMutation() ?
Retry from client to server. When the 1st time Mutations came to this RS,
the client was having RegionLocation for a particular region as this RS. When
multi () tried at RS, it found no online region as specified and so will fail
those actions. Client side we will get latest RegionLocation and retry . No
issues there.. Issue is that within the MultiRequest there may be some
remaining RegionActions for which Region is still there in this RS. We will
try with those actions in multi() and then these Mutations refer to invalid
Cells belonging to previous Mutations!
So this needs separate fix and test. I think we can do it in another issue not
here. Now also any one can get this bug if they explicitly mentioned a Codec
class in site.xml
> RPC client not using Codec and CellBlock for puts by default
> ------------------------------------------------------------
>
> Key: HBASE-15198
> URL: https://issues.apache.org/jira/browse/HBASE-15198
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.98.0
> Reporter: Anoop Sam John
> Assignee: Anoop Sam John
> Priority: Critical
> Attachments: HBASE-15198.patch, HBASE-15198_V2.patch,
> HBASE-15198_V3.patch
>
>
> For puts we use MultiServerCallable. Here to decide whether to use cellBlock
> we have
> {code}
> private boolean isCellBlock() {
> // This is not exact -- the configuration could have changed on us after
> connection was set up
> // but it will do for now.
> HConnection connection = getConnection();
> if (connection == null) return true; // Default is to do cellblocks.
> Configuration configuration = connection.getConfiguration();
> if (configuration == null) return true;
> String codec = configuration.get(HConstants.RPC_CODEC_CONF_KEY, "");
> return codec != null && codec.length() > 0;
> }
> {code}
> By default in hbase-default.xml, we dont have any Codec being specified.
> Where as in AbstractRpcClient we have
> {code}
> Codec getCodec() {
> // For NO CODEC, "hbase.client.rpc.codec" must be configured with empty
> string AND
> // "hbase.client.default.rpc.codec" also -- because default is to do cell
> block encoding.
> String className = conf.get(HConstants.RPC_CODEC_CONF_KEY,
> getDefaultCodec(this.conf));
> if (className == null || className.length() == 0) return null;
> try {
> return (Codec)Class.forName(className).newInstance();
> } catch (Exception e) {
> throw new RuntimeException("Failed getting codec " + className, e);
> }
> }
> .....
> public static String getDefaultCodec(final Configuration c) {
> // If "hbase.client.default.rpc.codec" is empty string -- you can't set
> it to null because
> // Configuration will complain -- then no default codec (and we'll pb
> everything). Else
> // default is KeyValueCodec
> return c.get(DEFAULT_CODEC_CLASS, KeyValueCodec.class.getCanonicalName());
> }
> {code}
> Our aim is to by def use Codec and it is KeyValueCodec.
> The codec finding in MultiServerCallable to be same way as in
> AbstractRpcClient and then only we will be doing cellblock stuff.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
