fix fabric8io#4910 / fabric8io#4923 addressing inconsistent behavior …

…with exec streams

CHANGELOG.md

@@ -23,6 +23,7 @@
 * Fix #4931: using coarse grain locking for all mock server operations
 * Fix #4947: typo in HttpClient.Factory scoring system logic
 * Fix #4928: allows non-okhttp clients to handle invalid status
+* Fix #4910 / #4923: addressing inconsistent behavior with pod exec operations
 
 #### Improvements
 * Fix #4675: adding a fully client side timeout for informer watches

httpclient-vertx/src/main/java/io/fabric8/kubernetes/client/vertx/VertxWebSocket.java

@@ -44,7 +44,14 @@ void init() {
       ws.pause();
       listener.onMessage(this, msg);
     });
-    ws.closeHandler(v -> listener.onClose(this, ws.closeStatusCode(), ws.closeReason()));
+    // if the server sends a ping, we're in trouble with our fetch strategy as there is
+    // no ping handler to increase the demand - this should not be an immediate issue as
+    // the api server does not seem to be sending pings
+
+    // if for whatever reason we send a ping, pong counts against the demand, so we need more
+    ws.pongHandler(b -> ws.fetch(1));
+    // use end, not close, because close is processed immediately vs. end is in frame order
+    ws.endHandler(v -> listener.onClose(this, ws.closeStatusCode(), ws.closeReason()));
     ws.exceptionHandler(err -> listener.onError(this, err));
     listener.onOpen(this);
   }

kubernetes-client/src/main/java/io/fabric8/kubernetes/client/dsl/internal/ExecWatchInputStream.java

@@ -66,6 +66,7 @@ void consume(List<ByteBuffer> value) {
         request.run();
         return;
       }
+      assert !complete || failed == null;
       buffers.addAll(value);
       buffers.notifyAll();
     }

kubernetes-client/src/main/java/io/fabric8/kubernetes/client/dsl/internal/core/v1/PodOperationsImpl.java

@@ -480,7 +480,8 @@ private void copyFile(String source, File target) {
     }
 
     try (OutputStream out = new BufferedOutputStream(new FileOutputStream(destination))) {
-      readTo(out, readFileCommand(source)).get();
+      ExecWatch w = writingOutput(out).exec(readFileCommand(source));
+      w.exitCode().get();
     } catch (Exception e) {
       throw KubernetesClientException.launderThrowable(e);
     }
@@ -495,20 +496,6 @@ private InputStream read(String... command) {
     return watch.getOutput();
   }
 
-  private Future<?> readTo(OutputStream out, String... cmd) {
-    ExecWatch w = writingOutput(out).exec(cmd);
-    CompletableFuture<Integer> result = w.exitCode();
-    result.whenComplete((i, t) -> {
-      try {
-        out.close();
-      } catch (Exception e) {
-        result.obtrudeException(e);
-      }
-      w.close();
-    });
-    return result;
-  }
-
   private void copyDir(String source, File target) throws Exception {
     //Let's wrap the code to a runnable inner class to avoid NoClassDef on Option classes.
     try {

kubernetes-itests/src/test/java/io/fabric8/kubernetes/PodIT.java

@@ -295,7 +295,7 @@ void uploadFile(String uploadPath) throws IOException {
     try (InputStream checkIs = podResource.file(uploadPath).read();
         BufferedReader br = new BufferedReader(new InputStreamReader(checkIs, StandardCharsets.UTF_8))) {
       String result = br.lines().collect(Collectors.joining(System.lineSeparator()));
-      assertEquals("I'm uploaded", result);
+      assertEquals("I'm uploaded", result, () -> checkFile(podResource, null, uploadPath));
     }
   }
 
@@ -315,7 +315,7 @@ void uploadBinaryFile() throws IOException {
     try (InputStream checkIs = podResource.file("/tmp/binfile").read();) {
       ByteArrayOutputStream baos = new ByteArrayOutputStream();
       InputStreamPumper.transferTo(checkIs, baos::write);
-      assertArrayEquals(bytes, baos.toByteArray());
+      assertArrayEquals(bytes, baos.toByteArray(), () -> checkFile(podResource, null, "/tmp/binfile"));
     }
   }
 
@@ -348,7 +348,7 @@ void copyDir() throws IOException {
     PodResource podResource = client.pods().withName("pod-standard");
     podResource.dir("/etc").withReadyWaitTimeout(POD_READY_WAIT_IN_MILLIS).copy(tmpDir);
 
-    Path msg = tmpDir.resolve("/etc/hosts");
+    Path msg = tmpDir.resolve("etc/hosts");
     assertTrue(Files.exists(msg));
   }
 
@@ -367,7 +367,23 @@ void copyFile() throws IOException {
     try (InputStream is = Files.newInputStream(msg);
         BufferedReader br = new BufferedReader(new InputStreamReader(is, StandardCharsets.UTF_8))) {
       String result = br.lines().collect(Collectors.joining(System.lineSeparator()));
-      assertEquals("hello", result);
+      assertEquals("hello", result, () -> checkFile(podResource, msg, "/msg.txt"));
+    }
+  }
+
+  private String checkFile(PodResource podResource, Path msg, String remoteFile) {
+    try {
+      ByteArrayOutputStream baos = new ByteArrayOutputStream();
+      podResource.writingOutput(baos).withReadyWaitTimeout(POD_READY_WAIT_IN_MILLIS).exec("sh", "-c",
+          String.format("ls -al %s", remoteFile)).exitCode().get();
+      String ls = new String(baos.toByteArray());
+      if (msg != null) {
+        byte[] bytes = Files.readAllBytes(msg);
+        return String.format("%s local bytes %s", ls, bytes.length);
+      }
+      return ls;
+    } catch (Exception e) {
+      throw new RuntimeException(e);
     }
   }