diff --git a/build.gradle b/build.gradle
index f8f618e..66c9186 100644
--- a/build.gradle
+++ b/build.gradle
@@ -37,10 +37,10 @@ allprojects {
   }
   
   ext {
-    fulcrumVersion = "0.14.0"
-    yconfVersion = "0.3.1"
-    zerologVersion = "0.14.0"
-    hazelcastVersion = "3.10"
+    fulcrumVersion = "0.15.1"
+    yconfVersion = "0.4.0"
+    zerologVersion = "0.15.0"
+    hazelcastVersion = "3.10.2"
   }
   
   dependencies {
diff --git a/core/src/main/java/com/obsidiandynamics/meteor/DefaultPublisher.java b/core/src/main/java/com/obsidiandynamics/meteor/DefaultPublisher.java
index d96b7ac..b5ff343 100644
--- a/core/src/main/java/com/obsidiandynamics/meteor/DefaultPublisher.java
+++ b/core/src/main/java/com/obsidiandynamics/meteor/DefaultPublisher.java
@@ -1,5 +1,7 @@
 package com.obsidiandynamics.meteor;
 
+import static com.obsidiandynamics.retry.Retry.*;
+
 import java.util.*;
 import java.util.concurrent.*;
 
@@ -45,7 +47,7 @@ private static class AsyncRecord {
     final StreamConfig streamConfig = config.getStreamConfig();
 
     final Retry retry = new Retry()
-        .withExceptionClass(HazelcastException.class)
+        .withExceptionMatcher(isA(HazelcastException.class))
         .withAttempts(Integer.MAX_VALUE)
         .withBackoff(100)
         .withFaultHandler(config.getZlg()::w)
diff --git a/core/src/main/java/com/obsidiandynamics/meteor/DefaultSubscriber.java b/core/src/main/java/com/obsidiandynamics/meteor/DefaultSubscriber.java
index 8841924..9d12808 100644
--- a/core/src/main/java/com/obsidiandynamics/meteor/DefaultSubscriber.java
+++ b/core/src/main/java/com/obsidiandynamics/meteor/DefaultSubscriber.java
@@ -1,5 +1,7 @@
 package com.obsidiandynamics.meteor;
 
+import static com.obsidiandynamics.retry.Retry.*;
+
 import java.util.*;
 import java.util.concurrent.*;
 
@@ -34,6 +36,8 @@ public final class DefaultSubscriber implements Subscriber, Joinable {
   
   private final WorkerThread keeperThread;
   
+  private final int readBatchSize;
+  
   private volatile long nextReadOffset;
   
   private volatile long lastReadOffset;
@@ -58,12 +62,13 @@ public final class DefaultSubscriber implements Subscriber, Joinable {
     
     final StreamConfig streamConfig = config.getStreamConfig();
     final Retry retry = new Retry()
-        .withExceptionClass(HazelcastException.class)
+        .withExceptionMatcher(isA(HazelcastException.class))
         .withAttempts(Integer.MAX_VALUE)
         .withBackoff(100)
         .withFaultHandler(config.getZlg()::w)
         .withErrorHandler(config.getZlg()::e);
     buffer = new RetryableRingbuffer<>(retry, StreamHelper.getRingbuffer(instance, streamConfig));
+    readBatchSize = Math.min(1_000, streamConfig.getHeapCapacity());
     
     if (config.hasGroup()) {
       // checks for IllegalArgumentException; no initial assignment is made until poll() is called
@@ -134,7 +139,7 @@ public RecordBatch poll(long timeoutMillis) throws InterruptedException {
           lastReadOffset = nextReadOffset - 1;
         }
       
-        final ICompletableFuture<ReadResultSet<byte[]>> f = buffer.readManyAsync(nextReadOffset, 1, 1_000, StreamHelper::isNotNull);
+        final ICompletableFuture<ReadResultSet<byte[]>> f = buffer.readManyAsync(nextReadOffset, 1, readBatchSize, StreamHelper::isNotNull);
         
         final long waitMillis = computeWait(wake, Long.MAX_VALUE);
         try {
diff --git a/core/src/test/java/com/obsidiandynamics/meteor/PublisherTest.java b/core/src/test/java/com/obsidiandynamics/meteor/PublisherTest.java
index c486687..71dfb20 100644
--- a/core/src/test/java/com/obsidiandynamics/meteor/PublisherTest.java
+++ b/core/src/test/java/com/obsidiandynamics/meteor/PublisherTest.java
@@ -209,10 +209,12 @@ private static void publish(int numMessages, Publisher publisher, List<Record> r
    */
   private static List<byte[]> readRemaining(Ringbuffer<byte[]> buffer, long startSequence) throws InterruptedException, ExecutionException {
     long adjStartSequence = startSequence;
+    final List<byte[]> items = new ArrayList<>();
     for (;;) {
       final ReadResultSet<byte[]> results;
       try {
-        results = buffer.readManyAsync(adjStartSequence, 0, 1000, null).get();
+        final int toRead = (int) Math.min(1_000, buffer.capacity());
+        results = buffer.readManyAsync(adjStartSequence, 0, toRead, null).get();
       } catch (ExecutionException e) {
         if (e.getCause() instanceof StaleSequenceException) {
           System.out.format("SSE: fast-forwarding start sequence to %d\n", buffer.headSequence());
@@ -222,9 +224,13 @@ private static List<byte[]> readRemaining(Ringbuffer<byte[]> buffer, long startS
           throw e;
         }
       }
-      final List<byte[]> items = new ArrayList<>(results.size());
-      results.forEach(items::add);
-      return items;
+      
+      if (results.size() > 0) {
+        results.forEach(items::add);
+        adjStartSequence += results.size();
+      } else {
+        return items;
+      }
     }
   }
 
diff --git a/elect/src/main/java/com/obsidiandynamics/meteor/Election.java b/elect/src/main/java/com/obsidiandynamics/meteor/Election.java
index 8637a62..6e43028 100644
--- a/elect/src/main/java/com/obsidiandynamics/meteor/Election.java
+++ b/elect/src/main/java/com/obsidiandynamics/meteor/Election.java
@@ -1,5 +1,7 @@
 package com.obsidiandynamics.meteor;
 
+import static com.obsidiandynamics.retry.Retry.*;
+
 import java.util.*;
 
 import com.hazelcast.core.*;
@@ -31,7 +33,7 @@ public Election(ElectionConfig config, IMap<String, byte[]> leases) {
     this.config = config;
 
     final Retry retry = new Retry()
-        .withExceptionClass(HazelcastException.class)
+        .withExceptionMatcher(isA(HazelcastException.class))
         .withAttempts(Integer.MAX_VALUE)
         .withBackoff(100)
         .withFaultHandler(config.getZlg()::w)