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HBASE-13362 Set max result size from client only (like scanner caching).

This commit is contained in:
Lars Hofhansl 2015-04-08 21:43:01 -07:00
parent e2a90a7114
commit 80dbf06651
3 changed files with 33 additions and 6 deletions
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21
hbase-common/src/main/java/org/apache/hadoop/hbase/HConstants.java
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@ -613,12 +613,19 @@ public final class HConstants {
public static final UUID DEFAULT_CLUSTER_ID = new UUID(0L,0L);
/**
* Parameter name for maximum number of bytes returned when calling a
* scanner's next method.
* Parameter name for maximum number of bytes returned when calling a scanner's next method.
* Controlled by the client.
*/
public static final String HBASE_CLIENT_SCANNER_MAX_RESULT_SIZE_KEY =
"hbase.client.scanner.max.result.size";
/**
* Parameter name for maximum number of bytes returned when calling a scanner's next method.
* Controlled by the server.
*/
public static final String HBASE_SERVER_SCANNER_MAX_RESULT_SIZE_KEY =
"hbase.server.scanner.max.result.size";
/**
* Maximum number of bytes returned when calling a scanner's next method.
* Note that when a single row is larger than this limit the row is still
@ -628,6 +635,16 @@ public final class HConstants {
*/
public static final long DEFAULT_HBASE_CLIENT_SCANNER_MAX_RESULT_SIZE = 2 * 1024 * 1024;
/**
* Maximum number of bytes returned when calling a scanner's next method.
* Note that when a single row is larger than this limit the row is still
* returned completely.
* Safety setting to protect the region server.
*
* The default value is 100MB. (a client would rarely request larger chunks on purpose)
*/
public static final long DEFAULT_HBASE_SERVER_SCANNER_MAX_RESULT_SIZE = 100 * 1024 * 1024;
/**
* Parameter name for client pause value, used mostly as value to wait
* before running a retry of a failed get, region lookup, etc.

10
hbase-common/src/main/resources/hbase-default.xml
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@ -1306,6 +1306,16 @@ possible configurations would overwhelm and obscure the important.
</description>
</property>
<property>
<name>hbase.server.scanner.max.result.size</name>
<value>104857600</value>
<description>Maximum number of bytes returned when calling a scanner's next method.
Note that when a single row is larger than this limit the row is still returned completely.
The default value is 100MB.
This is a safety setting to protect the server from OOM situations.
</description>
</property>
<property>
<name>hbase.status.published</name>
<value>false</value>

4
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RSRpcServices.java
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@ -820,8 +820,8 @@ public class RSRpcServices implements HBaseRPCErrorHandler,
HConstants.HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD,
HConstants.DEFAULT_HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD);
maxScannerResultSize = rs.conf.getLong(
HConstants.HBASE_CLIENT_SCANNER_MAX_RESULT_SIZE_KEY,
HConstants.DEFAULT_HBASE_CLIENT_SCANNER_MAX_RESULT_SIZE);
HConstants.HBASE_SERVER_SCANNER_MAX_RESULT_SIZE_KEY,
HConstants.DEFAULT_HBASE_SERVER_SCANNER_MAX_RESULT_SIZE);
// Set our address, however we need the final port that was given to rpcServer
isa = new InetSocketAddress(initialIsa.getHostName(), rpcServer.getListenerAddress().getPort());