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fix: align ip version preference for the wrapped emulator #1052

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merged 4 commits into from Jan 5, 2022
Merged

fix: align ip version preference for the wrapped emulator #1052

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b8d5fc8
fix: align ip version preference for the wrapped emulator
igorbernstein2 Oct 28, 2021
d12eab6
remove debug
igorbernstein2 Oct 28, 2021
f70f704
Merge remote-tracking branch 'origin/main' into emulator-ipv6
igorbernstein2 Jan 4, 2022
31c0d7d
whitespace
igorbernstein2 Jan 4, 2022
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19 changes: 18 additions & 1 deletion ...cloud-bigtable-emulator/src/main/java/com/google/cloud/bigtable/emulator/v2/Emulator.java
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Expand Up @@ -25,10 +25,13 @@
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.UnknownHostException;
import java.nio.file.Path;
import java.util.Locale;
import java.util.Optional;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.logging.Level;
Expand Down Expand Up @@ -98,10 +101,24 @@ public synchronized void start() throws IOException, TimeoutException, Interrupt
}
this.port = getAvailablePort();

// Try to align the localhost address across java & golang emulator
// This should fix issues on systems that default to ipv4 but the jvm is started with
// -Djava.net.preferIPv6Addresses=true
Optional<String> localhostAddress = Optional.empty();
try {
localhostAddress = Optional.of(InetAddress.getByName(null).getHostAddress());
} catch (UnknownHostException e) {
}

// Workaround https://bugs.openjdk.java.net/browse/JDK-8068370
for (int attemptsLeft = 3; process == null; attemptsLeft--) {
try {
process = Runtime.getRuntime().exec(String.format("%s -port %d", executable, port));
String cmd = executable.toString();
if (localhostAddress.isPresent()) {
cmd += String.format(" -host [%s]", localhostAddress.get());
}
cmd += String.format(" -port %d", port);
process = Runtime.getRuntime().exec(cmd);
} catch (IOException e) {
if (attemptsLeft > 0) {
Thread.sleep(1000);
Expand Down