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GH-1271: [Flight] Reject port 0 in NettyClientBuilder #1282

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GH-1271: [Flight] Reject port 0 in NettyClientBuilder #1282

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f1d0735
GH-1027: Reject port 0 in NettyClientBuilder and fix tests that omitt…
ennuite Aug 30, 2026
c28a347
GH-1027: Parameterize invalid port test to cover port 0
ennuite Aug 31, 2026
97ab8b2
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ennuite Aug 31, 2026
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4 changes: 2 additions & 2 deletions flight/flight-core/src/main/java/org/apache/arrow/flight/grpc/NettyClientBuilder.java
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Original file line number Diff line number Diff line change
Expand Up @@ -140,9 +140,9 @@ public NettyChannelBuilder build() {
case LocationSchemes.GRPC_TLS:
{
final int port = location.getUri().getPort();
if (port < 0 || port > 65535) {
if (port < 1 || port > 65535) {

@jbonofre jbonofre Sep 1, 2026

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URI.getPort() returns -1 to mean "no port present in the URI", not "the user asked for port -1".
Folding it into this range check produces Invalid port -1: must be between 1 and 65535 (a number that the user never defined).

That path is reachable: a Location like grpc+tls://myhost with no port, and also ArrowFlightSqlClientHandler.getStreams(), which does withPort(endpointUri.getPort()) on an endpoint URI that may carry no port.

Since this PR is rewriting the message anyway, this seems like the moment to split
the two cases:

if (port == -1) {
  throw new IllegalArgumentException(
      "No port specified in location URI: " + location.getUri());
}
if (port < 1 || port > 65535) {
  throw new IllegalArgumentException(
      "Invalid port " + port + ": must be between 1 and 65535.");
}

throw new IllegalArgumentException(
"Invalid port " + port + ": must be between 0 and 65535.");
"Invalid port " + port + ": must be between 1 and 65535.");

@jbonofre jbonofre Sep 1, 2026

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This narrows the accepted input range of published public API: NettyClientBuilder,
and transitively FlightClient.Builder. Third-party code that today calls FlightClient.builder(allocator, someLocation).build() with a port-0 location
(a server location captured before start(), or a placeholder resolved later) gets a lazily-failing channel today and an immediate IllegalArgumentException after this.

The change itself is right, but neither NettyClientBuilder.build() nor
FlightClient.Builder.build() documents the precondition.

Could we add an @throws IllegalArgumentException javadoc stating the accepted range, so callers can
discover it without hitting it in production?

}
builder = NettyChannelBuilder.forAddress(location.getUri().getHost(), port);
break;
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1 change: 1 addition & 0 deletions ...ght-sql-jdbc-core/src/test/java/org/apache/arrow/driver/jdbc/ConnectionMutualTlsTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -184,6 +184,7 @@ public void testGetNonAuthenticatedEncryptedClientNoAuth() throws Exception {
try (ArrowFlightSqlClientHandler client =
new ArrowFlightSqlClientHandler.Builder()
.withHost(FLIGHT_SERVER_TEST_EXTENSION.getHost())
.withPort(FLIGHT_SERVER_TEST_EXTENSION.getPort())
.withTlsRootCertificates(tlsRootCertsPath)
.withClientCertificate(clientMTlsCertPath)
.withClientKey(clientMTlsKeyPath)
Expand Down
16 changes: 9 additions & 7 deletions flight/flight-sql-jdbc-core/src/test/java/org/apache/arrow/driver/jdbc/ConnectionTest.java
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Expand Up @@ -63,6 +63,8 @@
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.RegisterExtension;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;

/** Tests for {@link Connection}. */
public class ConnectionTest {
Expand Down Expand Up @@ -204,21 +206,20 @@ public void testGetBasicClientAuthenticatedShouldOpenConnection() throws Excepti
}

/**
* Checks if the exception IllegalArgumentException is thrown when trying to establish an
* unencrypted connection providing with an invalid port.
*
* @throws SQLException on error.
* Checks if a SQLException is thrown when trying to establish an unencrypted connection with an
* invalid port.
*/
@Test
public void testUnencryptedConnectionProvidingInvalidPort() throws Exception {
@ParameterizedTest
@ValueSource(ints = {0, -1, 65536, 65537})
public void testUnencryptedConnectionProvidingInvalidPort(int invalidPort) {
final Properties properties = new Properties();

properties.put(ArrowFlightConnectionProperty.HOST.camelName(), "localhost");
properties.put(ArrowFlightConnectionProperty.USER.camelName(), userTest);
properties.put(ArrowFlightConnectionProperty.PASSWORD.camelName(), passTest);
properties.put(ArrowFlightConnectionProperty.USE_ENCRYPTION.camelName(), false);
final String invalidUrl =
"jdbc:arrow-flight-sql://" + FLIGHT_SERVER_TEST_EXTENSION.getHost() + ":" + 65537;
"jdbc:arrow-flight-sql://" + FLIGHT_SERVER_TEST_EXTENSION.getHost() + ":" + invalidPort;

assertThrows(
SQLException.class,
Expand All @@ -240,6 +241,7 @@ public void testGetBasicClientNoAuthShouldOpenConnection() throws Exception {
try (ArrowFlightSqlClientHandler client =
new ArrowFlightSqlClientHandler.Builder()
.withHost(FLIGHT_SERVER_TEST_EXTENSION.getHost())
.withPort(FLIGHT_SERVER_TEST_EXTENSION.getPort())
.withBufferAllocator(allocator)
.withEncryption(false)
.build()) {
Expand Down
1 change: 1 addition & 0 deletions ...-sql-jdbc-core/src/test/java/org/apache/arrow/driver/jdbc/ConnectionTlsRootCertsTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -135,6 +135,7 @@ public void testGetNonAuthenticatedEncryptedClientNoAuth() throws Exception {
try (ArrowFlightSqlClientHandler client =
new ArrowFlightSqlClientHandler.Builder()
.withHost(FLIGHT_SERVER_TEST_EXTENSION.getHost())
.withPort(FLIGHT_SERVER_TEST_EXTENSION.getPort())
.withTlsRootCertificates(tlsRootCertsPath)
.withBufferAllocator(allocator)
.withEncryption(true)
Expand Down
1 change: 1 addition & 0 deletions ...ht/flight-sql-jdbc-core/src/test/java/org/apache/arrow/driver/jdbc/ConnectionTlsTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -172,6 +172,7 @@ public void testGetNonAuthenticatedEncryptedClientNoAuth() throws Exception {
try (ArrowFlightSqlClientHandler client =
new ArrowFlightSqlClientHandler.Builder()
.withHost(FLIGHT_SERVER_TEST_EXTENSION.getHost())
.withPort(FLIGHT_SERVER_TEST_EXTENSION.getPort())
.withSystemTrustStore(false)
.withTrustStorePath(trustStorePath)
.withTrustStorePassword(trustStorePass)
Expand Down
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