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Subject: svn commit: r1201704 - in /lucene/dev/branches/solrcloud/solr:
 core/src/java/org/apache/solr/cloud/
 core/src/java/org/apache/solr/update/processor/
 core/src/test/org/apache/solr/cloud/
 solrj/src/java/org/apache/solr/client/solrj/impl/ test-framework/sr...
Date: Mon, 14 Nov 2011 13:50:57 -0000
To: commits@lucene.apache.org
From: markrmiller@apache.org
Message-Id: <20111114135058.3F9B32388860@eris.apache.org>

Author: markrmiller
Date: Mon Nov 14 13:50:57 2011
New Revision: 1201704

URL: http://svn.apache.org/viewvc?rev=1201704&view=rev
Log:
push on FullDistributedZkTest and tweaks/fixes around that

Modified:
    lucene/dev/branches/solrcloud/solr/core/src/java/org/apache/solr/cloud/ZkController.java
    lucene/dev/branches/solrcloud/solr/core/src/java/org/apache/solr/update/processor/DistributedUpdateProcessor.java
    lucene/dev/branches/solrcloud/solr/core/src/java/org/apache/solr/update/processor/DistributedUpdateProcessorFactory.java
    lucene/dev/branches/solrcloud/solr/core/src/test/org/apache/solr/cloud/FullDistributedZkTest.java
    lucene/dev/branches/solrcloud/solr/solrj/src/java/org/apache/solr/client/solrj/impl/CloudSolrServer.java
    lucene/dev/branches/solrcloud/solr/test-framework/src/java/org/apache/solr/BaseDistributedSearchTestCase.java

Modified: lucene/dev/branches/solrcloud/solr/core/src/java/org/apache/solr/cloud/ZkController.java
URL: http://svn.apache.org/viewvc/lucene/dev/branches/solrcloud/solr/core/src/java/org/apache/solr/cloud/ZkController.java?rev=1201704&r1=1201703&r2=1201704&view=diff
==============================================================================
--- lucene/dev/branches/solrcloud/solr/core/src/java/org/apache/solr/cloud/ZkController.java (original)
+++ lucene/dev/branches/solrcloud/solr/core/src/java/org/apache/solr/cloud/ZkController.java Mon Nov 14 13:50:57 2011
@@ -138,8 +138,6 @@ public final class ZkController {
           public void command() {
             try {
               // we need to create all of our lost watches
-//              zkStateReader.makeCollectionsNodeWatches();
-//              zkStateReader.makeShardsWatches(true);
               createEphemeralLiveNode();
               zkStateReader.createClusterStateWatchersAndUpdate();
               
@@ -486,7 +484,12 @@ public final class ZkController {
 				log.info("Attempting to update /clusterstate version "
 						+ stat.getVersion());
 				CloudState state = CloudState.load(data);
-
+				Map<String,Slice> slices = state.getSlices(cloudDesc.getCollectionName());
+				if (slices != null && slices.containsKey(shardZkNodeName)) {
+				  // TODO: we where already registered - go into recovery mode
+				  System.out.println("RECOVERY");
+				}
+				
 				state.addSlice(cloudDesc.getCollectionName(), slice);
 
 				try {

Modified: lucene/dev/branches/solrcloud/solr/core/src/java/org/apache/solr/update/processor/DistributedUpdateProcessor.java
URL: http://svn.apache.org/viewvc/lucene/dev/branches/solrcloud/solr/core/src/java/org/apache/solr/update/processor/DistributedUpdateProcessor.java?rev=1201704&r1=1201703&r2=1201704&view=diff
==============================================================================
--- lucene/dev/branches/solrcloud/solr/core/src/java/org/apache/solr/update/processor/DistributedUpdateProcessor.java (original)
+++ lucene/dev/branches/solrcloud/solr/core/src/java/org/apache/solr/update/processor/DistributedUpdateProcessor.java Mon Nov 14 13:50:57 2011
@@ -681,7 +681,6 @@ public class DistributedUpdateProcessor 
               url = shard;
             }
             
-            // TODO: allow shard syntax to use : to specify replicas
             SolrServer server = new CommonsHttpSolrServer(url, client);
             sreq.ursp = server.request(sreq.ureq);
           

Modified: lucene/dev/branches/solrcloud/solr/core/src/java/org/apache/solr/update/processor/DistributedUpdateProcessorFactory.java
URL: http://svn.apache.org/viewvc/lucene/dev/branches/solrcloud/solr/core/src/java/org/apache/solr/update/processor/DistributedUpdateProcessorFactory.java?rev=1201704&r1=1201703&r2=1201704&view=diff
==============================================================================
--- lucene/dev/branches/solrcloud/solr/core/src/java/org/apache/solr/update/processor/DistributedUpdateProcessorFactory.java (original)
+++ lucene/dev/branches/solrcloud/solr/core/src/java/org/apache/solr/update/processor/DistributedUpdateProcessorFactory.java Mon Nov 14 13:50:57 2011
@@ -176,7 +176,8 @@ public class DistributedUpdateProcessorF
       replicasUrl.append(replicaUrl);
     }
 
-    params.add("self", self);
+    // we don't currently use self - it does not yet work with the | notation anyhow
+    //params.add("self", self);
     params.add("shards", replicasUrl.toString());
   }
   

Modified: lucene/dev/branches/solrcloud/solr/core/src/test/org/apache/solr/cloud/FullDistributedZkTest.java
URL: http://svn.apache.org/viewvc/lucene/dev/branches/solrcloud/solr/core/src/test/org/apache/solr/cloud/FullDistributedZkTest.java?rev=1201704&r1=1201703&r2=1201704&view=diff
==============================================================================
--- lucene/dev/branches/solrcloud/solr/core/src/test/org/apache/solr/cloud/FullDistributedZkTest.java (original)
+++ lucene/dev/branches/solrcloud/solr/core/src/test/org/apache/solr/cloud/FullDistributedZkTest.java Mon Nov 14 13:50:57 2011
@@ -19,7 +19,13 @@ package org.apache.solr.cloud;
 
 import java.io.IOException;
 import java.net.MalformedURLException;
+import java.net.URI;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
 
+import org.apache.solr.client.solrj.SolrQuery;
 import org.apache.solr.client.solrj.SolrServer;
 import org.apache.solr.client.solrj.SolrServerException;
 import org.apache.solr.client.solrj.embedded.JettySolrRunner;
@@ -28,7 +34,9 @@ import org.apache.solr.client.solrj.impl
 import org.apache.solr.client.solrj.request.UpdateRequest;
 import org.apache.solr.client.solrj.response.QueryResponse;
 import org.apache.solr.common.SolrInputDocument;
-import org.apache.solr.common.cloud.SolrZkClient;
+import org.apache.solr.common.cloud.Slice;
+import org.apache.solr.common.cloud.ZkNodeProps;
+import org.apache.solr.common.cloud.ZkStateReader;
 import org.apache.solr.common.params.CommonParams;
 import org.apache.solr.common.params.ModifiableSolrParams;
 import org.junit.BeforeClass;
@@ -58,6 +66,11 @@ public class FullDistributedZkTest exten
   String invalidField="ignore_exception__invalid_field_not_in_schema";
   private static final int sliceCount = 3;
   
+  
+  protected Map<SolrServer,ZkNodeProps> clientToInfo = new HashMap<SolrServer,ZkNodeProps>();
+  protected Map<String,List<SolrServer>> shardToClient = new HashMap<String,List<SolrServer>>();
+  protected Map<String,List<JettySolrRunner>> shardToJetty = new HashMap<String,List<JettySolrRunner>>();
+  
   @BeforeClass
   public static void beforeClass() throws Exception {
     System.setProperty("CLOUD_UPDATE_DELAY", "0");
@@ -69,6 +82,10 @@ public class FullDistributedZkTest exten
   public FullDistributedZkTest() {
     fixShardCount = true;
     shardCount = 6;
+    
+    // TODO: for now, turn off stress because it uses regular clients, and we 
+    // need the cloud client because we kill servers
+    stress = 0;
   }
   
   @Override
@@ -83,8 +100,73 @@ public class FullDistributedZkTest exten
       if (sb.length() > 0) sb.append(',');
       JettySolrRunner j = createJetty(testDir, testDir + "/jetty" + i, null, "solrconfig-distrib-update.xml");
       jettys.add(j);
-      clients.add(createNewSolrServer(j.getLocalPort()));
-
+      SolrServer client = createNewSolrServer(j.getLocalPort());
+      clients.add(client);
+    }
+    
+    for (SolrServer client : clients) {
+      // find info for this client in zk
+      ZkStateReader zk = new ZkStateReader(zkServer.getZkAddress(), 10000,
+          AbstractZkTestCase.TIMEOUT);
+      zk.createClusterStateWatchersAndUpdate();
+      
+      Map<String,Slice> slices = zk.getCloudState().getSlices(
+          DEFAULT_COLLECTION);
+      zk.updateCloudState(true);
+      
+      for (Map.Entry<String,Slice> slice : slices.entrySet()) {
+        Map<String,ZkNodeProps> theShards = slice.getValue().getShards();
+        for (Map.Entry<String,ZkNodeProps> shard : theShards.entrySet()) {
+          String shardName = new URI(
+              ((CommonsHttpSolrServer) client).getBaseURL()).getPort()
+              + "_solr_";
+          // System.out.println("key:" + shard.getKey() + " try:" + shardName);
+          if (shard.getKey().endsWith(shardName)) {
+            System.out.println("shard:" + slice.getKey());
+            System.out.println(shard.getValue());
+            
+            clientToInfo.put(client, shard.getValue());
+            List<SolrServer> list = shardToClient.get(slice.getKey());
+            if (list == null) {
+              list = new ArrayList<SolrServer>();
+              shardToClient.put(slice.getKey(), list);
+            }
+            list.add(client);
+          }
+        }
+      }
+      
+    }
+    
+    for (JettySolrRunner jetty : jettys) {
+      // find info for this client in zk
+      ZkStateReader zk = new ZkStateReader(zkServer.getZkAddress(), 10000,
+          AbstractZkTestCase.TIMEOUT);
+      zk.createClusterStateWatchersAndUpdate();
+      
+      Map<String,Slice> slices = zk.getCloudState().getSlices(
+          DEFAULT_COLLECTION);
+      zk.updateCloudState(true);
+      
+      for (Map.Entry<String,Slice> slice : slices.entrySet()) {
+        Map<String,ZkNodeProps> theShards = slice.getValue().getShards();
+        for (Map.Entry<String,ZkNodeProps> shard : theShards.entrySet()) {
+          String shardName = jetty.getLocalPort() + "_solr_";
+          // System.out.println("key:" + shard.getKey() + " try:" + shardName);
+          if (shard.getKey().endsWith(shardName)) {
+//            System.out.println("shard:" + slice.getKey());
+//            System.out.println(shard.getValue());
+            
+            List<JettySolrRunner> list = shardToJetty.get(slice.getKey());
+            if (list == null) {
+              list = new ArrayList<JettySolrRunner>();
+              shardToJetty.put(slice.getKey(), list);
+            }
+            list.add(jetty);
+          }
+        }
+      }
+      
     }
     
     // build the shard string
@@ -124,6 +206,7 @@ public class FullDistributedZkTest exten
     boolean pick = random.nextBoolean();
     
     int which = (doc.getField(id).toString().hashCode() & 0x7fffffff) % sliceCount;
+    System.out.println("add doc to shard:" + which);
     
     if (pick) {
       which = which + ((shardCount / sliceCount) * random.nextInt(sliceCount-1));
@@ -138,6 +221,22 @@ public class FullDistributedZkTest exten
     ureq.process(client);
   }
   
+  protected void index_specific(int serverNumber, Object... fields) throws Exception {
+    SolrInputDocument doc = new SolrInputDocument();
+    for (int i = 0; i < fields.length; i += 2) {
+      doc.addField((String) (fields[i]), fields[i + 1]);
+    }
+    controlClient.add(doc);
+
+    CommonsHttpSolrServer client = (CommonsHttpSolrServer) clients.get(serverNumber);
+
+    UpdateRequest ureq = new UpdateRequest();
+    ureq.add(doc);
+    ureq.setParam("update.chain", "distrib-update-chain");
+    System.out.println("set update.chain on req");
+    ureq.process(client);
+  }
+  
   protected void del(String q) throws Exception {
     controlClient.deleteByQuery(q);
     for (SolrServer client : clients) {
@@ -156,8 +255,14 @@ public class FullDistributedZkTest exten
   public void doTest() throws Exception {
 
     del("*:*");
+    
     indexr(id,1, i1, 100, tlong, 100,t1,"now is the time for all good men"
             ,"foo_f", 1.414f, "foo_b", "true", "foo_d", 1.414d);
+    
+    commit();
+    
+    assertDocCounts();
+    
     indexr(id,2, i1, 50 , tlong, 50,t1,"to come to the aid of their country."
     );
     indexr(id,3, i1, 2, tlong, 2,t1,"how now brown cow"
@@ -189,7 +294,9 @@ public class FullDistributedZkTest exten
     }
 
     commit();
-
+    
+    assertDocCounts();
+    
     handle.clear();
     handle.put("QTime", SKIPVAL);
     handle.put("timestamp", SKIPVAL);
@@ -276,11 +383,12 @@ public class FullDistributedZkTest exten
     handle.remove("facet_fields");
 
 
-    // index the same document to two servers and make sure things
+    // index the same document to two shards and make sure things
     // don't blow up.
+    // assumes first n clients are first n shards
     if (clients.size()>=2) {
       index(id,100, i1, 107 ,t1,"oh no, a duplicate!");
-      for (int i=0; i<clients.size(); i++) {
+      for (int i=0; i<shardCount; i++) {
         index_specific(i, id,100, i1, 107 ,t1,"oh no, a duplicate!");
       }
       commit();
@@ -288,7 +396,47 @@ public class FullDistributedZkTest exten
       query("q","fox duplicate horses", "hl","true", "hl.fl", t1);
       query("q","*:*", "rows",100);
     }
+    
+    // TODO: this is failing because the counts per shard don't add up to the control - distrib total
+    // counts do match, so the same doc (same id) must be on different shards.
+    // our hash is not stable yet in distrib update proc
+    //assertDocCounts();
+
+    // kill a shard
+    JettySolrRunner deadShard = killShard("shard2", 0);
+    JettySolrRunner deadShard2 = killShard("shard3", 1);
+    
+    // TODO: test indexing after killing shards - smart solrj client should not
+    // care at all
+    
+    // try to index to a living shard at shard2
+    index_specific(3, id,1000, i1, 107 ,t1,"specific doc!");
+    
+    commit();
+    
+    // TMP: try adding a doc with CloudSolrServer
+    CloudSolrServer server = new CloudSolrServer(zkServer.getZkAddress());
+    server.setDefaultCollection(DEFAULT_COLLECTION);
+    long numFound1 = server.query(new SolrQuery("*:*")).getResults().getNumFound();
+    
+    SolrInputDocument doc = new SolrInputDocument();
+    doc.addField("id", 1001);
+    
+    controlClient.add(doc);
 
+    UpdateRequest ureq = new UpdateRequest();
+    ureq.add(doc);
+    ureq.setParam("update.chain", "distrib-update-chain");
+    ureq.process(server);
+    
+    commit();
+    
+    long numFound2 = server.query(new SolrQuery("*:*")).getResults().getNumFound();
+    
+    // lets just check that the one doc since last commit made it in...
+    //TODO this sometimes fails - need to dig up what missed/messed up part causes it
+    assertEquals(numFound1 + 1, numFound2);
+    
     // test debugging
     handle.put("explain", UNORDERED);
     handle.put("debug", UNORDERED);
@@ -299,24 +447,82 @@ public class FullDistributedZkTest exten
     query("q", "id:[1 TO 5]", CommonParams.DEBUG, CommonParams.RESULTS);
     query("q", "id:[1 TO 5]", CommonParams.DEBUG, CommonParams.QUERY);
 
+    
+    System.out.println(controlClient.query(new SolrQuery("*:*")).getResults().getNumFound());
+    for (SolrServer client : clients) {
+      try {
+        System.out.println(client.query(new SolrQuery("*:*")).getResults().getNumFound());
+      } catch(Exception e) {
+        
+      }
+    }
     // TODO: This test currently fails because debug info is obtained only
     // on shards with matches.
     // query("q","matchesnothing","fl","*,score", "debugQuery", "true");
 
+    // this should trigger a recovery phase on deadShard
+    deadShard.start(true);
+    
+    
+    
     // Thread.sleep(10000000000L);
     if (DEBUG) {
       super.printLayout();
     }
   }
 
+  private JettySolrRunner killShard(String shard, int index) throws Exception {
+    // kill
+    System.out.println(" KILL:" + shardToClient);
+    System.out.println(shardToJetty.get(shard));
+    
+    // kill first shard in shard2
+    JettySolrRunner jetty = shardToJetty.get(shard).get(index);
+    jetty.stop();
+    return jetty;
+  }
+
+  private void assertDocCounts() throws Exception {
+    // TODO: as we create the clients, we should build a map from shard to node/client
+    // and node/client to shard?
+    System.out.println("after first doc:");
+    long controlCount = controlClient.query(new SolrQuery("*:*")).getResults().getNumFound();
+    System.out.println("control:" + controlClient.query(new SolrQuery("*:*")).getResults().getNumFound());
+    // do some really inefficient mapping...
+    ZkStateReader zk = new ZkStateReader(zkServer.getZkAddress(), 10000, AbstractZkTestCase.TIMEOUT);
+    zk.createClusterStateWatchersAndUpdate();
+  //  Map<SolrServer,ZkNodeProps> clientToInfo = new HashMap<SolrServer,ZkNodeProps>();
+    Map<String,Slice> slices = zk.getCloudState().getSlices(DEFAULT_COLLECTION);
+ 
+    zk.updateCloudState(true);
+    
+    long clientCount = 0;
+    for (SolrServer client : clients) {
+      for (Map.Entry<String,Slice> slice : slices.entrySet()) {
+        Map<String,ZkNodeProps> theShards = slice.getValue().getShards();
+        for (Map.Entry<String,ZkNodeProps> shard : theShards.entrySet()) {
+          String shardName = new URI(((CommonsHttpSolrServer)client).getBaseURL()).getPort() + "_solr_";
+         // System.out.println("key:" + shard.getKey() + " try:" + shardName);
+          if (shard.getKey().endsWith(shardName)) {
+            System.out.println("shard:" + slice.getKey());
+            System.out.println(shard.getValue());
+          }
+        }
+      }
+      
+      long count = client.query(new SolrQuery("*:*")).getResults().getNumFound();
+      
+      System.out.println("docs:" + count + "\n\n");
+      clientCount += count;
+    }
+    assertEquals("Doc Counts do not add up", controlCount, clientCount / (shardCount / sliceCount));
+  }
+
   volatile CloudSolrServer solrj;
 
   @Override
   protected QueryResponse queryServer(ModifiableSolrParams params) throws SolrServerException {
 
-    if (r.nextBoolean())
-      return super.queryServer(params);
-
     // use the distributed solrj client
     if (solrj == null) {
       synchronized(this) {

Modified: lucene/dev/branches/solrcloud/solr/solrj/src/java/org/apache/solr/client/solrj/impl/CloudSolrServer.java
URL: http://svn.apache.org/viewvc/lucene/dev/branches/solrcloud/solr/solrj/src/java/org/apache/solr/client/solrj/impl/CloudSolrServer.java?rev=1201704&r1=1201703&r2=1201704&view=diff
==============================================================================
--- lucene/dev/branches/solrcloud/solr/solrj/src/java/org/apache/solr/client/solrj/impl/CloudSolrServer.java (original)
+++ lucene/dev/branches/solrcloud/solr/solrj/src/java/org/apache/solr/client/solrj/impl/CloudSolrServer.java Mon Nov 14 13:50:57 2011
@@ -31,6 +31,7 @@ import java.util.concurrent.TimeoutExcep
 import org.apache.solr.client.solrj.SolrRequest;
 import org.apache.solr.client.solrj.SolrServer;
 import org.apache.solr.client.solrj.SolrServerException;
+import org.apache.solr.client.solrj.request.UpdateRequest;
 import org.apache.solr.common.SolrException;
 import org.apache.solr.common.cloud.CloudState;
 import org.apache.solr.common.cloud.Slice;
@@ -118,6 +119,11 @@ public class CloudSolrServer extends Sol
     CloudState cloudState = zkStateReader.getCloudState();
 
     String collection = request.getParams().get("collection", defaultCollection);
+    
+    if (request instanceof UpdateRequest) {
+      // hack to kind of let updates work - should be fixed more completely
+      return updateRequest(cloudState, collection, request);
+    }
 
     // TODO: allow multiple collections to be specified via comma separated list
 
@@ -151,6 +157,39 @@ public class CloudSolrServer extends Sol
     return rsp.getResponse();
   }
 
+  private NamedList<Object> updateRequest(CloudState cloudState,
+      String collection, SolrRequest request) throws SolrServerException, IOException {
+    // TODO: prefer updating to the leader
+
+    Map<String,Slice> slices = cloudState.getSlices(collection);
+    Set<String> liveNodes = cloudState.getLiveNodes();
+
+    // IDEA: have versions on various things... like a global cloudState version
+    // or shardAddressVersion (which only changes when the shards change)
+    // to allow caching.
+
+    // build a map of unique nodes
+    // TODO: allow filtering by group, role, etc
+    Map<String,ZkNodeProps> nodes = new HashMap<String,ZkNodeProps>();
+    List<String> urlList = new ArrayList<String>();
+    for (Slice slice : slices.values()) {
+      for (ZkNodeProps nodeProps : slice.getShards().values()) {
+        String node = nodeProps.get(ZkStateReader.NODE_NAME);
+        if (!liveNodes.contains(node)) continue;
+        if (nodes.put(node, nodeProps) == null) {
+          String url = nodeProps.get(ZkStateReader.URL_PROP);
+          urlList.add(url);
+        }
+      }
+    }
+
+
+    // lets update to a server that is up...
+    CommonsHttpSolrServer server = new CommonsHttpSolrServer(urlList.get(0));
+    NamedList<Object> rsp = server.request(request);
+    return rsp;
+  }
+
   public void close() {
     if (zkStateReader != null) {
       synchronized(this) {

Modified: lucene/dev/branches/solrcloud/solr/test-framework/src/java/org/apache/solr/BaseDistributedSearchTestCase.java
URL: http://svn.apache.org/viewvc/lucene/dev/branches/solrcloud/solr/test-framework/src/java/org/apache/solr/BaseDistributedSearchTestCase.java?rev=1201704&r1=1201703&r2=1201704&view=diff
==============================================================================
--- lucene/dev/branches/solrcloud/solr/test-framework/src/java/org/apache/solr/BaseDistributedSearchTestCase.java (original)
+++ lucene/dev/branches/solrcloud/solr/test-framework/src/java/org/apache/solr/BaseDistributedSearchTestCase.java Mon Nov 14 13:50:57 2011
@@ -40,6 +40,7 @@ import org.apache.solr.client.solrj.resp
 import org.apache.solr.common.SolrDocument;
 import org.apache.solr.common.SolrDocumentList;
 import org.apache.solr.common.SolrInputDocument;
+import org.apache.solr.common.cloud.ZkNodeProps;
 import org.apache.solr.common.params.ModifiableSolrParams;
 import org.apache.solr.common.util.NamedList;
 import org.apache.solr.schema.TrieDateField;
@@ -69,6 +70,7 @@ public abstract class BaseDistributedSea
   protected JettySolrRunner controlJetty;
   protected List<SolrServer> clients = new ArrayList<SolrServer>();
   protected List<JettySolrRunner> jettys = new ArrayList<JettySolrRunner>();
+  
   protected String context = "/solr";
   protected String shards;
   protected String[] shardsArr;
@@ -310,7 +312,14 @@ public abstract class BaseDistributedSea
 
   protected void commit() throws Exception {
     controlClient.commit();
-    for (SolrServer client : clients) client.commit();
+    for (SolrServer client : clients) {
+      try {
+        client.commit();
+      } catch (SolrServerException e) {
+        // we might have killed a server on purpose in the test
+        log.warn("", e);
+      }
+    }
   }
 
   protected QueryResponse queryServer(ModifiableSolrParams params) throws SolrServerException {
@@ -322,12 +331,13 @@ public abstract class BaseDistributedSea
   }
 
   protected void query(Object... q) throws Exception {
+    
     final ModifiableSolrParams params = new ModifiableSolrParams();
 
     for (int i = 0; i < q.length; i += 2) {
       params.add(q[i].toString(), q[i + 1].toString());
     }
-
+    System.out.println("Q:" + params);
     final QueryResponse controlRsp = controlClient.query(params);
 
     setDistributedParams(params);
@@ -377,6 +387,8 @@ public abstract class BaseDistributedSea
   }
 
   public static String compare(NamedList a, NamedList b, int flags, Map<String, Integer> handle) {
+    System.out.println("resp a:" + a);
+    System.out.println("resp b:" + b);
     boolean ordered = (flags & UNORDERED) == 0;
 
     int posa = 0, posb = 0;