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/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.trino.server;
import com.google.common.base.StandardSystemProperty;
import com.google.common.collect.ImmutableSet;
import com.sun.management.UnixOperatingSystemMXBean;
import io.airlift.slice.Slice;
import io.airlift.slice.Slices;
import org.joda.time.DateTime;
import java.lang.Runtime.Version;
import java.lang.management.GarbageCollectorMXBean;
import java.lang.management.ManagementFactory;
import java.nio.ByteOrder;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.util.List;
import java.util.Locale;
import java.util.OptionalLong;
import java.util.stream.Stream;
import static com.google.common.collect.ImmutableList.toImmutableList;
import static java.lang.String.format;
final class TrinoSystemRequirements
{
private static final int MIN_FILE_DESCRIPTORS = 4096;
private static final int RECOMMENDED_FILE_DESCRIPTORS = 8192;
private TrinoSystemRequirements() {}
public static void verifyJvmRequirements()
{
verifyJavaVersion();
verify64BitJvm();
verifyOsArchitecture();
verifyByteOrder();
verifyUsingG1Gc();
verifyFileDescriptor();
verifySlice();
verifyUtf8();
}
private static void verify64BitJvm()
{
String dataModel = System.getProperty("sun.arch.data.model");
if (!"64".equals(dataModel)) {
failRequirement("Trino requires a 64-bit JVM (found %s)", dataModel);
}
}
private static void verifyByteOrder()
{
ByteOrder order = ByteOrder.nativeOrder();
if (!order.equals(ByteOrder.LITTLE_ENDIAN)) {
failRequirement("Trino requires a little endian platform (found %s)", order);
}
}
private static void verifyOsArchitecture()
{
String osName = StandardSystemProperty.OS_NAME.value();
String osArch = StandardSystemProperty.OS_ARCH.value();
if ("Linux".equals(osName)) {
if (!ImmutableSet.of("amd64", "aarch64", "ppc64le").contains(osArch)) {
failRequirement("Trino requires amd64, aarch64, or ppc64le on Linux (found %s)", osArch);
}
else if ("ppc64le".equals(osArch)) {
warnRequirement("Support for the POWER architecture is experimental");
}
}
else if ("Mac OS X".equals(osName)) {
if (!"x86_64".equals(osArch) && !"aarch64".equals(osArch)) {
failRequirement("Trino requires x86_64 or aarch64 on Mac OS X (found %s)", osArch);
}
}
else {
failRequirement("Trino requires Linux or Mac OS X (found %s)", osName);
}
}
private static void verifyJavaVersion()
{
Version required = Version.parse("17.0.3");
if (Runtime.version().compareTo(required) < 0) {
failRequirement("Trino requires Java %s at minimum (found %s)", required, Runtime.version());
}
}
private static void verifyUsingG1Gc()
{
try {
List garbageCollectors = ManagementFactory.getGarbageCollectorMXBeans().stream()
.map(GarbageCollectorMXBean::getName)
.collect(toImmutableList());
if (garbageCollectors.stream().noneMatch(name -> name.toUpperCase(Locale.US).startsWith("G1 "))) {
warnRequirement("Current garbage collectors are %s. Trino recommends the G1 garbage collector.", garbageCollectors);
}
}
catch (RuntimeException e) {
// This should never happen since we have verified the OS and JVM above
failRequirement("Cannot read garbage collector information: %s", e);
}
}
private static void verifyFileDescriptor()
{
OptionalLong maxFileDescriptorCount = getMaxFileDescriptorCount();
if (maxFileDescriptorCount.isEmpty()) {
// This should never happen since we have verified the OS and JVM above
failRequirement("Cannot read OS file descriptor limit");
}
if (maxFileDescriptorCount.getAsLong() < MIN_FILE_DESCRIPTORS) {
failRequirement("Trino requires at least %s file descriptors (found %s)", MIN_FILE_DESCRIPTORS, maxFileDescriptorCount.getAsLong());
}
if (maxFileDescriptorCount.getAsLong() < RECOMMENDED_FILE_DESCRIPTORS) {
warnRequirement("Current OS file descriptor limit is %s. Trino recommends at least %s", maxFileDescriptorCount.getAsLong(), RECOMMENDED_FILE_DESCRIPTORS);
}
}
private static OptionalLong getMaxFileDescriptorCount()
{
return Stream.of(ManagementFactory.getOperatingSystemMXBean())
.filter(UnixOperatingSystemMXBean.class::isInstance)
.map(UnixOperatingSystemMXBean.class::cast)
.mapToLong(UnixOperatingSystemMXBean::getMaxFileDescriptorCount)
.findFirst();
}
private static void verifySlice()
{
Slice slice = Slices.wrappedBuffer(new byte[5]);
slice.setByte(4, 0xDE);
slice.setByte(3, 0xAD);
slice.setByte(2, 0xBE);
slice.setByte(1, 0xEF);
if (slice.getInt(1) != 0xDEADBEEF) {
failRequirement("Slice library produced an unexpected result");
}
}
private static void verifyUtf8()
{
Charset defaultCharset = Charset.defaultCharset();
if (!defaultCharset.equals(StandardCharsets.UTF_8)) {
failRequirement("Trino requires that the default charset is UTF-8 (found %s). This can be set with the JVM command line option -Dfile.encoding=UTF-8", defaultCharset.name());
}
}
/**
* Perform a sanity check to make sure that the year is reasonably current, to guard against
* issues in third party libraries.
*/
public static void verifySystemTimeIsReasonable()
{
int currentYear = DateTime.now().year().get();
if (currentYear < 2022) {
failRequirement("Trino requires the system time to be current (found year %s)", currentYear);
}
}
private static void failRequirement(String format, Object... args)
{
System.err.println("ERROR: " + format(format, args));
System.exit(100);
}
private static void warnRequirement(String format, Object... args)
{
System.err.println("WARNING: " + format(format, args));
}
}
