Java SE 8u391 Enterprise Performance Pack - Bug Fixes and Updates

The following sections summarize changes made in Java SE 8u391 Enterprise Performance Pack. Bug fixes and any other changes are listed below in date order, most current update first. Note that bug fixes in the previous BPR are also included in the current update release.

 

Changes in Java SE 8u391-Perf b33

Bug Fixes

October 19, 2023

This BPR contains all of the fixes included in the previous JDK 8 Enterprise Performance Pack BPR.

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Java™ SE Development Kit 8, Update 391 Enterprise Performance Pack (JDK 8u391-PERF)

October 17, 2023

The full version string for this update release is 8u391-perf-b13 (where "b" means "build"). The version number is 8u391-perf.

 

IANA TZ Data 2023c

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 8u391 are specified in the following table:

 

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 8u391) be used after the next critical patch update scheduled for January 16, 2024.

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 8u391) on 2024-02-16. 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.

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Other Notes

 

Changes in Java SE 8u391-Perf

Bug Fixes

JDK 8u391 Enterprise Performance Pack includes the following fixes from JDK 17:

#	BugId	Component	Subcomponent	Summary
1	JDK-8274243	hotspot	compiler	Implement fast-path for ASCII-compatible CharsetEncoders on aarch64
2	JDK-8299544	hotspot	compiler	Improve performance of CRC32C intrinsics (non-AVX-512) for small inputs
3	JDK-8153837	hotspot	compiler	AArch64: Handle special cases for MaxINode & MinINode
4	JDK-8272586	hotspot	compiler	emit abstract machine code in hs-err logs
5	JDK-8308192	hotspot	compiler	Error in parsing replay file when staticfield is an array of single dimension
6	JDK-8309266	hotspot	compiler	C2: assert(final_con == (jlong)final_int) failed: final value should be integer
7	JDK-8300584	hotspot	compiler	Accelerate AVX-512 CRC32C for small buffers
8	JDK-8274986	hotspot	compiler	max code printed in hs-err logs should be configurable
9	JDK-8310126	hotspot	compiler	C1: Missing receiver null check in Reference::get intrinsic
10	JDK-8284760	hotspot	compiler	Correct type/array element offset in LibraryCallKit::get_state_from_digest_object()
11	JDK-8299158	hotspot	compiler	Improve MD5 intrinsic on AArch64
12	JDK-8303154	hotspot	compiler	Investigate and improve instruction cache flushing during compilation
13	JDK-8252990	hotspot	compiler	Intrinsify Unsafe.storeStoreFence
14	JDK-8305088	hotspot	compiler	SIGSEGV in Method::is_method_handle_intrinsic
15	JDK-8296545	hotspot	compiler	C2 Blackholes should allow load optimizations
16	JDK-8292713	hotspot	compiler	Unsafe.allocateInstance should be intrinsified without UseUnalignedAccesses
17	JDK-8302736	hotspot	compiler	Major performance regression in Math.log on aarch64
18	JDK-8307572	hotspot	compiler	AArch64: Vector registers are clobbered by some macroassemblers
19	JDK-8280396	hotspot	gc	G1: Full gc mark stack draining should prefer to make work available to other threads
20	JDK-8308643	hotspot	gc	Incorrect value of 'used' jvmstat counter
21	JDK-8284532	hotspot	jfr	Memory leak in BitSet::BitMapFragmentTable in JFR leak profiler
22	JDK-8283520	hotspot	jfr	JFR: Memory leak in dcmd_arena
23	JDK-8307526	hotspot	jfr	[JFR] Better handling of tampered JFR repository
24	JDK-8309862	hotspot	jfr	Unsafe list operations in JfrStringPool
25	JDK-8307331	hotspot	jvmti	Correctly update line maps when class redefine rewrites bytecodes
26	JDK-8306428	hotspot	runtime	RunThese30M.java crashed with assert(early->flag() == current->flag() || early->flag() == mtNone)
27	JDK-8297887	hotspot	runtime	Update Siphash
28	JDK-8305425	hotspot	runtime	Thread.isAlive0 doesn't need to call into the VM
29	JDK-8269466	hotspot	runtime	Factor out the common code for initializing and starting internal VM JavaThreads
30	JDK-8287854	hotspot	runtime	Dangling reference in ClassVerifier::verify_class
31	JDK-8303215	hotspot	runtime	Make thread stacks not use huge pages
32	JDK-8290067	hotspot	runtime	Show stack dimensions in UL logging when attaching threads
33	JDK-8283849	hotspot	svc	AsyncGetCallTrace may crash JVM on guarantee
34	JDK-8301170	hotspot	svc	perfMemory_windows.cpp add free_security_attr to early returns
35	JDK-8295657	hotspot	svc-agent	SA: Allow larger object alignments