fix zipkin provider can not receive full spans data (#1420)

apm-collector/apm-collector-thirdparty-receiver/receiver-zipkin/receiver-zipkin-provider/src/main/java/org/apache/skywalking/apm/collector/receiver/zipkin/provider/ZipkinReceiverProvider.java

@@ -31,6 +31,7 @@ import org.apache.skywalking.apm.collector.core.module.*;
 import org.apache.skywalking.apm.collector.jetty.manager.JettyManagerModule;
 import org.apache.skywalking.apm.collector.jetty.manager.service.JettyManagerService;
 import org.apache.skywalking.apm.collector.receiver.zipkin.define.ZipkinReceiverModule;
+import org.apache.skywalking.apm.collector.receiver.zipkin.provider.handler.SpanV1JettyHandler;
 import org.apache.skywalking.apm.collector.receiver.zipkin.provider.handler.SpanV2JettyHandler;
 import org.apache.skywalking.apm.collector.receiver.zipkin.provider.transform.Zipkin2SkyWalkingTransfer;
 import org.apache.skywalking.apm.collector.server.jetty.JettyServer;
@@ -74,6 +75,7 @@ public class ZipkinReceiverProvider extends ModuleProvider {
 
         JettyManagerService managerService = getManager().find(JettyManagerModule.NAME).getService(JettyManagerService.class);
         JettyServer jettyServer = managerService.createIfAbsent(config.getHost(), config.getPort(), config.getContextPath());
+        jettyServer.addHandler(new SpanV1JettyHandler(config, registerServices));
         jettyServer.addHandler(new SpanV2JettyHandler(config, registerServices));
 
         ISegmentParseService segmentParseService = getManager().find(AnalysisSegmentParserModule.NAME).getService(ISegmentParseService.class);

apm-collector/apm-collector-thirdparty-receiver/receiver-zipkin/receiver-zipkin-provider/src/main/java/org/apache/skywalking/apm/collector/receiver/zipkin/provider/handler/SpanProcessor.java

@@ -21,6 +21,8 @@ package org.apache.skywalking.apm.collector.receiver.zipkin.provider.handler;
 import org.apache.skywalking.apm.collector.receiver.zipkin.provider.RegisterServices;
 import org.apache.skywalking.apm.collector.receiver.zipkin.provider.ZipkinReceiverConfig;
 import org.apache.skywalking.apm.collector.receiver.zipkin.provider.cache.CacheFactory;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import zipkin2.Span;
 import zipkin2.codec.SpanBytesDecoder;
 
@@ -30,11 +32,23 @@ import java.io.IOException;
 import java.util.List;
 
 public class SpanProcessor {
+    private final Logger logger = LoggerFactory.getLogger(SpanProcessor.class);
+
     void convert(ZipkinReceiverConfig config, SpanBytesDecoder decoder, HttpServletRequest request, RegisterServices registerServices) throws IOException {
         int len = request.getContentLength();
         ServletInputStream iii = request.getInputStream();
         byte[] buffer = new byte[len];
-        iii.read(buffer, 0, len);
+
+        int readCntTotal = 0;
+        int readCntOnce;
+        while (readCntTotal < len) {
+            readCntOnce = iii.read(buffer, readCntTotal, len - readCntTotal);
+            if (readCntOnce <= 0) {
+                logger.error("Receive spans data failed.");
+                throw new IOException();
+            }
+            readCntTotal += readCntOnce;
+        }
 
         List<Span> spanList = decoder.decodeList(buffer);