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JDK 8u331 Update Release Notes

JDK 8 Update Release Notes

Java™ SE Development Kit 8, Update 331 (JDK 8u331)

April 19, 2022

The full version string for this update release is 8u331-b09 (where "b" means "build"). The version number is 8u331.


IANA TZ Data 2021e

For more information, refer to Timezone Data Versions in the JRE Software.


Security Baselines

The security baselines for the Java Runtime Environment (JRE) at the time of the release of JDK 8u331 are specified in the following table:

JRE Family Version JRE Security Baseline (Full Version String)
8 8u331-b09
7 7u341-b08


Keeping the JDK up to Date

Oracle recommends that the JDK is updated with each Critical Patch Update. In order to determine if a release is the latest, the Security Baseline page can be used to determine which is the latest version for each release family.

Critical patch updates, which contain security vulnerability fixes, are announced one year in advance on Critical Patch Updates, Security Alerts and Bulletins. It is not recommended that this JDK (version 8u331) be used after the next critical patch update scheduled for July 19, 2022.

Java SE Subscription customers managing JRE updates/installs for large number of desktops should consider using Java Advanced Management Console (AMC).

For systems unable to reach the Oracle Servers, a secondary mechanism expires this JRE (version 8u331) on 2022-08-19. After either condition is met (new release becoming available or expiration date reached), the JRE will provide additional warnings and reminders to users to update to the newer version. For more information, see 23.1.2 JRE Expiration Date in the Java Platform, Standard Edition Deployment Guide.


New Features

 New XML Processing Limits

Three processing limits have been added. These are:

  • jdk.xml.xpathExprGrpLimit

Description: Limits the number of groups an XPath expression can contain.

Type: integer

Value: A positive integer. A value less than or equal to 0 indicates no limit. If the value is not an integer, a NumberFormatException is thrown. Default 10.

  • jdk.xml.xpathExprOpLimit

Description: Limits the number of operators an XPath expression can contain.

Type: integer

Value: A positive integer. A value less than or equal to 0 indicates no limit. If the value is not an integer, a NumberFormatException is thrown. Default 100.

  • jdk.xml.xpathTotalOpLimit

Description: Limits the total number of XPath operators in an XSL Stylesheet.

Type: integer

Value: A positive integer. A value less than or equal to 0 indicates no limit. If the value is not an integer, a NumberFormatException is thrown. Default 10000.

Supported processors

  • jdk.xml.xpathExprGrpLimit and jdk.xml.xpathExprOpLimit are supported by the XPath processor.

  • All three limits are supported by the XSLT processor.

Setting properties

For the XSLT processor, the properties can be changed through the TransformerFactory. For example,

        TransformerFactory factory = TransformerFactory.newInstance();
        factory.setAttribute("jdk.xml.xpathTotalOpLimit", "1000");

For both the XPath and XSLT processors, the properties can be set through the system property and jaxp.properties configuration file located in the conf directory of the Java installation. For example,

        System.setProperty("jdk.xml.xpathExprGrpLimit", "20");

or in the jaxp.properties file,



There are two known issues:

  1. An XPath expression that contains a short form of the parent axis ".." can return incorrect results. See JDK-8284920 for details.
  2. An invalid XPath expression that ends with a relational operator such as ‘<’ ‘>’ and ‘=’ will cause the processor to erroneously throw StringIndexOutOfBoundsException instead of XPathExpressionException. See JDK-8284548 for details.
JDK-8270504 (not public)

Other Notes

 Only Expose Certificates With Proper Trust Settings as Trusted Certificate Entries in macOS KeychainStore

On macOS, only certificates with proper trust settings in the user keychain will be exposed as trusted certificate entries in the KeychainStore type of keystore. Also, calling the KeyStore::setCertificateEntry method or the keytool -importcert command on a KeychainStore keystore now fails with a KeyStoreException. Instead, call the macOS "security add-trusted-cert" command to add a trusted certificate into the user keychain.

JDK-8278449 (not public)

 Parsing of URL Strings in Built-in JNDI Providers Is More Strict

The parsing of URLs in the LDAP, DNS, and RMI built-in JNDI providers has been made more strict. The strength of the parsing can be controlled by system properties:

  -Dcom.sun.jndi.ldapURLParsing="legacy" | "compat" | "strict"    (to control "ldap:" URLs)
  -Dcom.sun.jndi.dnsURLParsing="legacy" | "compat" | "strict"     (to control "dns:" URLs)
  -Dcom.sun.jndi.rmiURLParsing="legacy" | "compat" | "strict"     (to control "rmi:" URLs)
  -Dcom.sun.jndi.corbaURLParsing="legacy" | "compat" | "strict"   (to control "iiop:" and "iiopname:" URLs) 


The default value is "compat" for all of the three providers.

  • The "legacy" mode turns the new validation off.
  • The "compat" mode limits incompatibilities.
  • The "strict" mode is stricter and may cause regression by rejecting URLs that an application might consider as valid.

In "compat" and "strict" mode, more validation is performed. As an example, in the URL authority component, the new parsing only accepts brackets around IPv6 literal addresses. Developers are encouraged to use java.net.URI constructors or its factory method to build URLs rather than handcrafting URL strings.

If an illegal URL string is found, a java.lang.IllegalArgumentException or a javax.naming.NamingException (or a subclass of it) is raised.

JDK-8278972 (not public)


Bug Fixes

This release also contains fixes for security vulnerabilities described in the Oracle Critical Patch Update. For a more complete list of the bug fixes included in this release, see the JDK 8u331 Bug Fixes page.