jianyun8023 commented on code in PR #22329:
URL: https://github.com/apache/pulsar/pull/22329#discussion_r1537194940
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pulsar-common/src/main/java/org/apache/pulsar/common/util/netty/DnsResolverUtil.java:
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@@ -19,12 +19,19 @@
package org.apache.pulsar.common.util.netty;
import io.netty.resolver.dns.DnsNameResolverBuilder;
-import java.lang.reflect.InvocationTargetException;
-import java.lang.reflect.Method;
+import java.security.Security;
+import java.util.Optional;
import lombok.extern.slf4j.Slf4j;
@Slf4j
public class DnsResolverUtil {
+
+ private static final String CACHE_POLICY_PROP = "networkaddress.cache.ttl";
+ private static final String CACHE_POLICY_PROP_FALLBACK =
"sun.net.inetaddr.ttl";
+ private static final String NEGATIVE_CACHE_POLICY_PROP =
"networkaddress.cache.negative.ttl";
+ private static final String NEGATIVE_CACHE_POLICY_PROP_FALLBACK =
"sun.net.inetaddr.negative.ttl";
+ /* default value for positive lookups */
+ private static final int JDK_DEFAULT_TTL = 30;
Review Comment:
ok
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