Without pre-creating index, heavy write rates OOM with too many threads, closes #1081.

modules/elasticsearch/src/main/java/org/elasticsearch/action/admin/indices/alias/TransportIndicesAliasesAction.java

@@ -52,7 +52,7 @@ public class TransportIndicesAliasesAction extends TransportMasterNodeOperationA
     }
 
     @Override protected String executor() {
-        return ThreadPool.Names.CACHED;
+        return ThreadPool.Names.MANAGEMENT;
     }
 
     @Override protected String transportAction() {

modules/elasticsearch/src/main/java/org/elasticsearch/action/admin/indices/analyze/TransportAnalyzeAction.java

@@ -58,7 +58,7 @@ public class TransportAnalyzeAction extends TransportSingleCustomOperationAction
     }
 
     @Override protected String executor() {
-        return ThreadPool.Names.CACHED;
+        return ThreadPool.Names.INDEX;
     }
 
     @Override protected AnalyzeRequest newRequest() {

modules/elasticsearch/src/main/java/org/elasticsearch/action/admin/indices/cache/clear/TransportClearIndicesCacheAction.java

@@ -57,7 +57,7 @@ public class TransportClearIndicesCacheAction extends TransportBroadcastOperatio
     }
 
     @Override protected String executor() {
-        return ThreadPool.Names.CACHED;
+        return ThreadPool.Names.MANAGEMENT;
     }
 
     @Override protected String transportAction() {

modules/elasticsearch/src/main/java/org/elasticsearch/action/admin/indices/close/TransportCloseIndexAction.java

@@ -51,7 +51,7 @@ public class TransportCloseIndexAction extends TransportMasterNodeOperationActio
     }
 
     @Override protected String executor() {
-        return ThreadPool.Names.CACHED;
+        return ThreadPool.Names.MANAGEMENT;
     }
 
     @Override protected String transportAction() {

modules/elasticsearch/src/main/java/org/elasticsearch/action/admin/indices/create/TransportCreateIndexAction.java

@@ -51,7 +51,7 @@ public class TransportCreateIndexAction extends TransportMasterNodeOperationActi
     }
 
     @Override protected String executor() {
-        return ThreadPool.Names.CACHED;
+        return ThreadPool.Names.MANAGEMENT;
     }
 
     @Override protected String transportAction() {

modules/elasticsearch/src/main/java/org/elasticsearch/action/admin/indices/delete/TransportDeleteIndexAction.java

@@ -60,7 +60,7 @@ public class TransportDeleteIndexAction extends TransportMasterNodeOperationActi
     }
 
     @Override protected String executor() {
-        return ThreadPool.Names.CACHED;
+        return ThreadPool.Names.MANAGEMENT;
     }
 
     @Override protected String transportAction() {

modules/elasticsearch/src/main/java/org/elasticsearch/action/admin/indices/exists/TransportIndicesExistsAction.java

@@ -45,7 +45,7 @@ public class TransportIndicesExistsAction extends TransportMasterNodeOperationAc
     }
 
     @Override protected String executor() {
-        return ThreadPool.Names.CACHED;
+        return ThreadPool.Names.MANAGEMENT;
     }
 
     @Override protected String transportAction() {

modules/elasticsearch/src/main/java/org/elasticsearch/action/admin/indices/flush/TransportFlushAction.java

@@ -57,7 +57,7 @@ public class TransportFlushAction extends TransportBroadcastOperationAction<Flus
     }
 
     @Override protected String executor() {
-        return ThreadPool.Names.CACHED;
+        return ThreadPool.Names.MANAGEMENT;
     }
 
     @Override protected String transportAction() {

modules/elasticsearch/src/main/java/org/elasticsearch/action/admin/indices/gateway/snapshot/TransportGatewaySnapshotAction.java

@@ -54,7 +54,7 @@ public class TransportGatewaySnapshotAction extends TransportBroadcastOperationA
     }
 
     @Override protected String executor() {
-        return ThreadPool.Names.CACHED;
+        return ThreadPool.Names.MANAGEMENT;
     }
 
     @Override protected String transportAction() {

modules/elasticsearch/src/main/java/org/elasticsearch/action/admin/indices/mapping/delete/TransportDeleteMappingAction.java

@@ -66,7 +66,7 @@ public class TransportDeleteMappingAction extends TransportMasterNodeOperationAc
     }
 
     @Override protected String executor() {
-        return ThreadPool.Names.CACHED;
+        return ThreadPool.Names.MANAGEMENT;
     }
 
     @Override protected String transportAction() {

modules/elasticsearch/src/main/java/org/elasticsearch/action/admin/indices/mapping/put/TransportPutMappingAction.java

@@ -52,7 +52,7 @@ public class TransportPutMappingAction extends TransportMasterNodeOperationActio
     }
 
     @Override protected String executor() {
-        return ThreadPool.Names.CACHED;
+        return ThreadPool.Names.MANAGEMENT;
     }
 
     @Override protected String transportAction() {

modules/elasticsearch/src/main/java/org/elasticsearch/action/admin/indices/open/TransportOpenIndexAction.java

@@ -51,7 +51,7 @@ public class TransportOpenIndexAction extends TransportMasterNodeOperationAction
     }
 
     @Override protected String executor() {
-        return ThreadPool.Names.CACHED;
+        return ThreadPool.Names.MANAGEMENT;
     }
 
     @Override protected String transportAction() {

modules/elasticsearch/src/main/java/org/elasticsearch/action/admin/indices/optimize/TransportOptimizeAction.java

@@ -60,7 +60,7 @@ public class TransportOptimizeAction extends TransportBroadcastOperationAction<O
     }
 
     @Override protected String executor() {
-        return ThreadPool.Names.CACHED;
+        return ThreadPool.Names.MERGE;
     }
 
     @Override protected String transportAction() {

modules/elasticsearch/src/main/java/org/elasticsearch/action/admin/indices/refresh/TransportRefreshAction.java

@@ -58,7 +58,7 @@ public class TransportRefreshAction extends TransportBroadcastOperationAction<Re
     }
 
     @Override protected String executor() {
-        return ThreadPool.Names.CACHED;
+        return ThreadPool.Names.MANAGEMENT;
     }
 
     @Override protected String transportAction() {

modules/elasticsearch/src/main/java/org/elasticsearch/action/admin/indices/segments/TransportIndicesSegmentsAction.java

@@ -61,7 +61,7 @@ public class TransportIndicesSegmentsAction extends TransportBroadcastOperationA
     }
 
     @Override protected String executor() {
-        return ThreadPool.Names.CACHED;
+        return ThreadPool.Names.MANAGEMENT;
     }
 
     @Override protected String transportAction() {

modules/elasticsearch/src/main/java/org/elasticsearch/action/admin/indices/settings/TransportUpdateSettingsAction.java

@@ -47,7 +47,7 @@ public class TransportUpdateSettingsAction extends TransportMasterNodeOperationA
     }
 
     @Override protected String executor() {
-        return ThreadPool.Names.CACHED;
+        return ThreadPool.Names.MANAGEMENT;
     }
 
     @Override protected String transportAction() {

modules/elasticsearch/src/main/java/org/elasticsearch/action/admin/indices/template/delete/TransportDeleteIndexTemplateAction.java

@@ -51,7 +51,7 @@ public class TransportDeleteIndexTemplateAction extends TransportMasterNodeOpera
     }
 
     @Override protected String executor() {
-        return ThreadPool.Names.CACHED;
+        return ThreadPool.Names.MANAGEMENT;
     }
 
     @Override protected String transportAction() {

modules/elasticsearch/src/main/java/org/elasticsearch/action/admin/indices/template/put/TransportPutIndexTemplateAction.java

@@ -51,7 +51,7 @@ public class TransportPutIndexTemplateAction extends TransportMasterNodeOperatio
     }
 
     @Override protected String executor() {
-        return ThreadPool.Names.CACHED;
+        return ThreadPool.Names.MANAGEMENT;
     }
 
     @Override protected String transportAction() {