[7.1.0] Retry binding to ipv6 localhost (bazelbuild#20755)

Fixes bazelbuild#20743

Commit
bazelbuild@1a0b3a0

PiperOrigin-RevId: 595935153
Change-Id: I0409552aa92f3886c5abf3bd3ce50d67594dab7e

Co-authored-by: Googler <pcloudy@google.com>

src/main/java/com/google/devtools/build/lib/server/GrpcServerImpl.java

@@ -46,6 +46,7 @@
 import com.google.devtools.build.lib.util.DetailedExitCode;
 import com.google.devtools.build.lib.util.ExitCode;
 import com.google.devtools.build.lib.util.InterruptedFailureDetails;
+import com.google.devtools.build.lib.util.OS;
 import com.google.devtools.build.lib.util.Pair;
 import com.google.devtools.build.lib.util.io.OutErr;
 import com.google.devtools.build.lib.vfs.FileSystemUtils;
@@ -376,6 +377,26 @@ public void interrupt() {
  commandManager.interruptInflightCommands();
  }
 
+ private Server bindIpv6WithRetries(InetSocketAddress address, int maxRetries) throws IOException {
+ Server server = null;
+ for (int attempt = 1; attempt <= maxRetries; attempt++) {
+ try {
+ server =
+ NettyServerBuilder.forAddress(address)
+ .addService(this)
+ .directExecutor()
+ .build()
+ .start();
+ break;
+ } catch (IOException e) {
+ if (attempt == maxRetries) {
+ throw e;
+ }
+ }
+ }
+ return server;
+ }
+
  @Override
  public void serve() throws AbruptExitException {
  Preconditions.checkState(!serving);
@@ -391,8 +412,10 @@ public void serve() throws AbruptExitException {
  if (Epoll.isAvailable() && !Socket.isIPv6Preferred()) {
  throw new IOException("ipv6 is not preferred on the system.");
  }
- server =
- NettyServerBuilder.forAddress(address).addService(this).directExecutor().build().start();
+ // For some strange reasons, Bazel server sometimes fails to bind to IPv6 localhost when
+ // running in macOS sandbox-exec with internet blocked. Retrying seems to help.
+ // See https://github.com/bazelbuild/bazel/issues/20743
+ server = bindIpv6WithRetries(address, OS.getCurrent() == OS.DARWIN ? 3 : 1);
  } catch (IOException ipv6Exception) {
  address = new InetSocketAddress("127.0.0.1", port);
  try {