HBASE-18511 Default no regions on master
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@ -1111,12 +1111,8 @@ public abstract class BaseLoadBalancer implements LoadBalancer {
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private static final Random RANDOM = new Random(System.currentTimeMillis());
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private static final Log LOG = LogFactory.getLog(BaseLoadBalancer.class);
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// Regions of these tables are put on the master by default.
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private static final String[] DEFAULT_TABLES_ON_MASTER =
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new String[] {AccessControlLists.ACL_TABLE_NAME.getNameAsString(),
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TableName.NAMESPACE_TABLE_NAME.getNameAsString(),
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TableName.META_TABLE_NAME.getNameAsString()};
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// Master carries no regions by default.
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private static final String[] DEFAULT_TABLES_ON_MASTER = new String[] {};
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public static final String TABLES_ON_MASTER =
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"hbase.balancer.tablesOnMaster";
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@ -1127,18 +1123,18 @@ public abstract class BaseLoadBalancer implements LoadBalancer {
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protected MasterServices services;
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/**
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* By default, regions of some small system tables such as meta,
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* namespace, and acl are assigned to the active master. If you don't
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* want to assign any region to the active master, you need to
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* configure "hbase.balancer.tablesOnMaster" to "none".
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* By default, master carries no regions. This method returns null.
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* If you want master to carry system tables say, then set
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* TABLES_ON_MASTER to AccessControlLists.ACL_TABLE_NAME.getNameAsString(),
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* TableName.NAMESPACE_TABLE_NAME.getNameAsString(),
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* TableName.META_TABLE_NAME.getNameAsString()
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*/
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protected static String[] getTablesOnMaster(Configuration conf) {
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String valueString = conf.get(TABLES_ON_MASTER);
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if (valueString == null) {
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return DEFAULT_TABLES_ON_MASTER;
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}
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valueString = valueString.trim();
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if (valueString.equalsIgnoreCase("none")) {
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if (valueString == null || valueString.trim().isEmpty()) {
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return null;
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}
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return StringUtils.getStrings(valueString);
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