HBASE-28252 Add sun.net.dns and sun.net.util to the JDK11+ module exp…

…orts in the hbase script (#5571)

Signed-off-by: Duo Zhang <zhangduo@apache.org>
Signed-off-by: Balazs Meszaros <meszibalu@apache.org>

bin/hbase

@@ -496,7 +496,7 @@ add_jdk11_deps_to_classpath() {
 }
 
 add_jdk11_jvm_flags() {
-  HBASE_OPTS="$HBASE_OPTS -Dorg.apache.hbase.thirdparty.io.netty.tryReflectionSetAccessible=true --add-modules jdk.unsupported --add-opens java.base/java.nio=ALL-UNNAMED --add-opens java.base/sun.nio.ch=ALL-UNNAMED --add-opens java.base/java.lang=ALL-UNNAMED --add-opens java.base/jdk.internal.ref=ALL-UNNAMED --add-opens java.base/java.lang.reflect=ALL-UNNAMED --add-exports java.base/jdk.internal.misc=ALL-UNNAMED --add-exports java.security.jgss/sun.security.krb5=ALL-UNNAMED"
+  HBASE_OPTS="$HBASE_OPTS -Dorg.apache.hbase.thirdparty.io.netty.tryReflectionSetAccessible=true --add-modules jdk.unsupported --add-opens java.base/java.nio=ALL-UNNAMED --add-opens java.base/sun.nio.ch=ALL-UNNAMED --add-opens java.base/java.lang=ALL-UNNAMED --add-opens java.base/jdk.internal.ref=ALL-UNNAMED --add-opens java.base/java.lang.reflect=ALL-UNNAMED --add-exports java.base/jdk.internal.misc=ALL-UNNAMED --add-exports java.security.jgss/sun.security.krb5=ALL-UNNAMED --add-exports java.base/sun.net.dns=ALL-UNNAMED --add-exports java.base/sun.net.util=ALL-UNNAMED"
 }
 
 add_opentelemetry_agent() {
@@ -786,7 +786,7 @@ fi
 # Add lib/jdk11 jars to the classpath
 
 if [ "${DEBUG}" = "true" ]; then
-  echo "Deciding on addition of lib/jdk11 jars to the classpath"
+  echo "Deciding on addition of lib/jdk11 jars to the classpath and setting JVM module flags"
 fi
 
 addJDK11Jars=false
@@ -879,6 +879,7 @@ export CLASSPATH
 if [ "${DEBUG}" = "true" ]; then
   echo "classpath=${CLASSPATH}" >&2
   HBASE_OPTS="${HBASE_OPTS} -Xdiag"
+  echo "HBASE_OPTS=${HBASE_OPTS}"
 fi
 
 # resolve the command arguments

bin/hbase-config.sh

@@ -178,8 +178,12 @@ EOF
 fi
 
 function read_java_version() {
-  properties="$("${JAVA_HOME}/bin/java" -XshowSettings:properties -version 2>&1)"
-  echo "${properties}" | "${GREP}" java.runtime.version | head -1 | "${SED}" -e 's/.* = \([^ ]*\)/\1/'
+  # Avoid calling java repeatedly
+  if [ -z "$read_java_version_cached" ]; then
+    properties="$("${JAVA_HOME}/bin/java" -XshowSettings:properties -version 2>&1)"
+    read_java_version_cached="$(echo "${properties}" | "${GREP}" java.runtime.version | head -1 | "${SED}" -e 's/.* = \([^ ]*\)/\1/')"
+  fi
+  echo "$read_java_version_cached"
 }
 
 # Inspect the system properties exposed by this JVM to identify the major