8064562: (doc) errors in java.io.PushbackInputStream API documentation Summary: Update the documentation as suggested to reflect reality. Reviewed-by: lancea, rriggs Contributed-by: Shaun Spiller <shaunspiller@gmail.com>

8072834: jrt-fs.jar missing META-INF/services/java.nio.file.spi.FileSystemProvider Reviewed-by: ihse

8065553: Failed Java web start via IPv6 (Java7u71 or later) Reviewed-by: xuelei

8072843: Typo in the description of the j.l.r.Executable.getAnnotatedReceiverType Reviewed-by: lancea

Merge

Merge

Merge

8066708: JMXStartStopTest fails to connect to port 38112 Reviewed-by: smarks, dsamersoff, olagneau

8071464: Clear up SVC jdk/test/* JRE layout dependencies other than those on tools.jar Reviewed-by: sla Contributed-by: alexander.kulyakhtin@oracle.com

8068613: Wrong number of objects pending finalization start Summary: Repeat until expected result, instead of fail after sleep() Reviewed-by: sla

8071641: java/lang/management/ThreadMXBean/SynchronizationStatistics.java intermittently failed with NPE Reviewed-by: sjiang, dfuchs

8069255: Suppress deprecation warnings in jdk.rmic module (jdk repo) Reviewed-by: rriggs

8050819: Please add java.util.Stream.ofNullable(T object) Reviewed-by: alanb, smarks

8068587: ScriptEngineFactory.getParameter() should specify NPE for a null key Reviewed-by: alanb, lagergren

8069277: Doclint regression in java/security/KeyStore.java Reviewed-by: weijun

8041395: Doclint regression in java.net.SocketOption Reviewed-by: lancea

8069072: GHASH performance improvement Summary: Eliminate allocations and vectorize Reviewed-by: mullan, ascarpino

8030179: java/nio/Buffer/Chars.java, testcases seems all pass but jtreg/testng failed with java.lang.AssertionError Summary: fix the surrogate corner case in SingleByte charset encoder Reviewed-by: psandoz, alanb

8057645: Deprivilege JAX-WS, JAXB, JAF to extension class loader Reviewed-by: alanb, dfuchs, lancea, mkos

8067800: Unexpected DateTimeException in the java.time.chrono.HijrahChronology.isLeapYear Summary: Check the year range consistently with other Hijrah date years Reviewed-by: lancea, scolebourne

8072495: (fs) Path.relativize() gives incorrect result for empty path on Windows Summary: Correct handling of empty path in Windows version of relativize() Reviewed-by: alanb, dfuchs

8071329: Stop exporting INCLUDE and LIB when building on windows Reviewed-by: ihse

8072615: test/lib/testlibrary/jdk/testlibrary/SimpleSSLContext.java wrong on Windows Reviewed-by: xuelei

Added tag jdk9-b50 for changeset d0f9f129c1f4

Merge

Merge

Merge

Merge

Merge

8067460: G1: TestResourceManagementFlagWithCommercialBuild.java failed on embedded platform Summary: Added extension point to detect unsupported options Reviewed-by: dholmes, bdelsart

8071805: BarrierSet::Other is not used and should be removed. Summary: Remove all occurences of BarrierSet::Other because the barrier set kind is never set to Other. Reviewed-by: tschatzl, kbarrett

8068589: GCCause should distinguish jcmd GC.run from System.gc() Summary: GCCause which is caused by GC.run diagnostic command should be different from System.gc() . Reviewed-by: sla, tamao

8069034: gc/g1/TestEagerReclaimHumongousRegionsClearMarkBits.java nightly failure Summary: When checking for humongous objects to reclaim, we dirty cards that might belong to freed regions. Fixed by checking the region before dirtying. Reviewed-by: tschatzl, brutisso

Merge

8069760: When iterating over a card, G1 often iterates over much more references than are contained in the card Summary: Properly bound the iteration work for objArray-oops. Reviewed-by: mgerdin, kbarrett

8068942: Improve validation of -XX:G1ConfidencePercent value Summary: Validate during argument processing and simplify usage by assuming validated. Reviewed-by: jmasa, tschatzl

8069273: Decrease Hot Card Cache Lock contention Reviewed-by: tschatzl, mgerdin

8064947: Clean up BarrierSet ctor/dtor Summary: Make abstract base call contructors protected and require a "kind" argument. Reviewed-by: jmasa, jwilhelm

Merge

8072405: [TESTBUG] DCMD tests needs at least compact3 profile Reviewed-by: jbachorik, sla

8072403: [TESTBUG] HeapDumpTest and HeapDumpAllTest fails to find jhat in non-JDK runs Reviewed-by: jbachorik, sla

8072401: [TESTBUG] Some of the newly added DCMD tests fail due to lack of -XX:+UsePerfData Reviewed-by: jbachorik, sla

Merge

8068655: frame::safe_for_sender() computes incorrect sender_sp value for interpreted frames Reviewed-by: dcubed, coleenp, bdelsart

Merge

8071962: The SA code needs to be updated to support Symbol lookup from the shared archive. Summary: Support shared symbols lookup. Reviewed-by: minqi, sspitsyn, dsamersoff, iklam

8071908: Port internal Diagnostic Command tests and test framework to jtreg Reviewed-by: jbachorik, egahlin, ykantser, mtobiass

8071909: Port testlibrary improvments in jdk/test to hotspot/test as required for DCMD test port Reviewed-by: jbachorik, egahlin, ykantser, mtobiass

8071784: serviceability/attach/AttachWithStalePidFile.java should be quarantined Reviewed-by: sla, jbachorik

8071584: [TESTBUG] runtime/Unsafe/AllocateMemory.java crashed on OOM during compilation. Reviewed-by: dholmes, gtriantafill, jprovino

8049632: JDK 1.8.0 b132 :Linux x64 : Crash in ClassFileParser::copy_localvariable_table(..) Summary: Use resource allocated hashtable for local variable table checking Reviewed-by: kamg, sspitsyn

Added tag jdk9-b50 for changeset 674362e1d111

Merge

8072132: Filter out additional files when stripping Reviewed-by: erikj, tbell

8072732: Regression in configure due to JDK-8069057 Reviewed-by: erikj, tbell

8062223: Upgrading to ccache 1.3.10 disables the use of ccache Reviewed-by: ihse

8071767: Improve names and dependencies for image targets Reviewed-by: ihse, erikj, dholmes Contributed-by: ingemar.aberg@oracle.com, magnus.ihse.bursie@oracle.com

8072106: Properly handle dependencies for deleted header files Reviewed-by: erikj

8071329: Stop exporting INCLUDE and LIB when building on windows Reviewed-by: ihse

Added tag jdk9-b50 for changeset 67486ff44b55

Added tag jdk9-b50 for changeset 1550b2f6b63d

Merge

Merge

Merge

8072445: tools/javac/lambda/MethodReference55.java fails across platforms Summary: remove copyright from test header Reviewed-by: jlahoda

8069551: Move java.security.acl from compact3 to java.base Reviewed-by: alanb, mullan, wetmore

8072054: Cannot build langtools if checked-out in a directory ending with \"com\" Summary: Making sure a proper package name is used when generating Properties classes Reviewed-by: mcimadamore

8069265: ClassCastException when compiled with JDK 9b08+, JDK8 compiles OK. Summary: Alternate fix for 8015499 to eliminate extra checkcast (by working around a limitation in Types#asSuper) without the side effect that results in 8069265 Reviewed-by: mcimadamore, jjg Contributed-by: srikanth.adayapalam@oracle.com

8071629: Write new test to test -j switch Reviewed-by: jjg

Added tag jdk9-b49 for changeset ac59fe6cd98f

Merge

Added tag jdk9-b49 for changeset abeda3261f92

Merge

Merge

8051710: Convert JAXP function tests: javax.xml.jaxp14.* to jtreg (testng) tests Reviewed-by: lancea, joehw Contributed-by: frank.yuan@oracle.com

8051709: Convert JAXP function tests: javax.xml.datatype to jtreg (testng) tests Reviewed-by: lancea Contributed-by: frank.yuan@oracle.com

Added tag jdk9-b49 for changeset f9e5640d832e

Merge

Merge

8072626: Test for JDK-8068872 fails in tip Reviewed-by: lagergren, jlaskey

8068872: Nashorn JSON.parse drops numeric keys Reviewed-by: attila, lagergren

8062141: Various performance issues parsing JSON Reviewed-by: lagergren, attila

8072595: nashorn should not use obj.getClass() for null checks Reviewed-by: hannesw, attila

8072000: New compiler warning after JDK-8067139 Reviewed-by: hannesw, sundar

Added tag jdk9-b49 for changeset bdc353778a28

Merge

Added tag jdk9-b49 for changeset 08067f67dde0

Merge

Merge

8072458: jdk/test/Makefile references (to be removed) win32 directory in jtreg Reviewed-by: alanb

8072456: @since tags missing from TimeUnit Reviewed-by: alanb, martin

8072042: (tz) Support tzdata2015a Reviewed-by: coffeys, okutsu

8065213: Specify and implement PlatformMBeanProvider for looking for all platform MBeans Reviewed-by: dfuchs, mchung, jbachorik

8071643: sun.security.krb5.KrbApReq.authenticate() is not thread safe Reviewed-by: mullan

8069551: Move java.security.acl from compact3 to java.base Reviewed-by: alanb, mullan, wetmore

8068278: ArrayIndexOutOfBoundsException instead of DateTimeException in j.t.chrono.JapaneseChronology.eraOf() Summary: Corrected era range check Reviewed-by: mchung, lancea

8068033: JNI exception pending in jdk/src/share/bin/java.c Reviewed-by: mchung, serb

Merge

Merge

Merge

Merge

Merge

8068730: Increase the precision of the implementation of java.time.Clock.systemUTC() Summary: Changes the implementation of java.time.Clock.systemUTC() to take advantage of the maximum resolution of the underlying native clock on which System.currentTimeMillis() is based. Reviewed-by: dholmes, rriggs, scolebourne, sla

8071582: com/sun/jdi/GetLocalVariables4Test.sh should be quarantined Reviewed-by: sspitsyn, sla

8068162: jvmtiRedefineClasses.cpp: guarantee(false) failed: OLD and/or OBSOLETE method(s) found Summary: enable the test: java/lang/instrument/IsModifiableClassAgent.java Reviewed-by: coleenp, dcubed Contributed-by: serguei.spitsyn@oracle.com

8071324: com/sun/jdi/ConnectedVMs.java should be quarantined Reviewed-by: sla

8044419: TEST_BUG: com/sun/jdi/JdbReadTwiceTest.sh fails when run under root Reviewed-by: dsamersoff, sla Contributed-by: mattias.tobiasson@oracle.com

8067945: SVC jdk/test/* should be cleaned from JRE layout dependency Reviewed-by: sla Contributed-by: alexander.kulyakhtin@oracle.com

8069296: java/lang/management/MemoryMXBean/LowMemoryTest.java should be quarantined Reviewed-by: sla

Merge

8072371: Add two failing svc tests to the problem list Reviewed-by: lancea

8072135: Add javax/xml/ws/8046817/GenerateEnumSchema.java to the problem list Reviewed-by: rriggs

8072030: Race condition in ThenComposeExceptionTest.java Reviewed-by: chegar

8050820: Please add java.util.Optional.stream() to convert Optional<T> to Stream<T> Reviewed-by: alundblad, forax, chegar, jrose

8059324: orElseThrow has different signatures for OptionalPrimitive and Optional<T> Reviewed-by: lancea, chegar

8048689: Clarify documentation on BaseStream.spliterator Reviewed-by: lancea, chegar

8068284: Missing @throws in DateTimeFormatterBuilder.appendOffset 8068285: Missing @throws in DateTimeFormatterBuilder.appendInstant 8062803: 'principal' should be 'principle' in java.time package description 8062796: java.time.format.DateTimeFormatter error in API doc example Reviewed-by: lancea, mchung

8055330: (process spec) ProcessBuilder.start and Runtime.exec should throw UnsupportedOperationException on platforms that don't support Summary: Clarify optional behavior and the exception thrown when not supported Reviewed-by: dfuchs, martin

6880737: (fs) FileLock constructors don't throw NPE if the channel argument is null Summary: Throw IllegalArgumentException if the channel parameter is null Reviewed-by: alanb

8067669: Documentation for methods in Number incomplete regarding too large values. Summary: Remove statments about rounding and truncation from the *Valud() methods Reviewed-by: rriggs, darcy, alundblad

Added tag jdk9-b49 for changeset 6e8154707178

Merge

Merge

8072450: 9-dev build failed on elinux-i586 and rlinux-i586 Summary: added LL suffix to constant declaration Reviewed-by: dholmes, coleenp, sla

Merge

Merge

8008678: JSR 292: constant pool reconstitution must support pseudo strings Summary: Keep orig idx from pseudo-string to UTF8, use 2nd lsb CPSlot to mark pseudo-string. Reviewed-by: coleenp, jrose Contributed-by: serguei.spitsyn@oracle.com

Merge

Merge

Merge

8068730: Increase the precision of the implementation of java.time.Clock.systemUTC() Summary: Changes the implementation of java.time.Clock.systemUTC() to take advantage of the maximum resolution of the underlying native clock on which System.currentTimeMillis() is based. Reviewed-by: dholmes, rriggs, scolebourne, sla

8071545: Tests are still excluded while the appropriate bug has been fixed Reviewed-by: sspitsyn, sla

8071530: Update OS detection code to reflect Windows 10 version change Reviewed-by: sla, mgronlun

8068162: jvmtiRedefineClasses.cpp: guarantee(false) failed: OLD and/or OBSOLETE method(s) found Summary: adjust Unsafe methods in the itable/vtable if Unsafe is redefined Reviewed-by: coleenp, dcubed Contributed-by: serguei.spitsyn@oracle.com

8068778: [TESTBUG] CompressedClassSpaceSizeInJmapHeap.java fails if SA not available Reviewed-by: coleenp, sla

8069207: [TESTBUG] Exception thrown for java.lang.NoSuchMethodError: sun.misc.Unsafe.monitorExit Reviewed-by: gtriantafill, dholmes

8067480: Crash in klassItable::initialize_itable_for_interface when running vm.runtime.defmeth.StaticMethodsTest. Summary: A static method should be skipped in entirety by find_instance_method(), searching should continue to find an overpass method of the same name and signature if present. Reviewed-by: acorn, hseigel

8064940: JMH javac performance regressions on solaris-sparcv9 in 9-b34 Summary: Aligning code heap sizes to large page size if supported. Reviewed-by: kvn, anoll

Merge

8069125: compiler/codecache/stress tests timeout in nightlies Summary: added timeout between one of test threads iterations, adjusted hole test execution time Reviewed-by: kvn

8066998: [TESTBUG] compiler/whitebox/ForceNMethodSweepTest.java : sweep shouldn't increase usage Summary: disable background compilation Reviewed-by: kvn

8071312: compiler/arguments/CheckCompileThresholdScaling.java fails Summary: Change the way VM handles CompileThresholdScaling==0, update test Reviewed-by: kvn, drchase, fzhinkin

8031064: build_vm_def.sh not working correctly for new build cross compile Summary: move nm and awk code into vm.make Reviewed-by: dsamersoff, dholmes

Merge

8071302: assert(!_reg_node[reg_lo] || edge_from_to(_reg_node[reg_lo], def)) failed: after block local Summary: Add merge nodes to node to block mapping Reviewed-by: kvn, vlivanov

8069126: compiler/rtm/locking/TestRTMTotalCountIncrRate.java nightly failure Reviewed-by: kvn

8069035: compiler/oracle/CheckCompileCommandOption.java nightly failure Summary: Fixed whitespace handling and added test cases Reviewed-by: kvn, anoll, zmajo

8069389: CompilerOracle prefix wildcarding is broken for long strings Summary: Replace strcpy with memmove Reviewed-by: kvn

8069580: String intrinsic related cleanups Summary: Small cleanup of string intrinsic related code. Reviewed-by: kvn, roland

Merge

Added tag jdk9-b49 for changeset 6a22230c068f

Merge

8069551: Move java.security.acl from compact3 to java.base Reviewed-by: alanb, mullan, wetmore

Merge

Merge

Added tag jdk9-b49 for changeset dd613dc718a1

Added tag jdk9-b49 for changeset 5b8db585a33c

Merge

Merge

Merge

8071617: move pathToURLs from javac.file.Locations to javadoc.DocletInvoker Reviewed-by: ksrini

8068937: jdeps shows "not found" if target class has no reference other than its own package Reviewed-by: alanb

8068463: Group 10c: golden files for tests in tools/javac dir Reviewed-by: jjg, mcimadamore

Added tag jdk9-b48 for changeset 6e2e298c50f1

Merge

Merge

8046817: JDK 8 schemagen tool does not generate xsd files for enum types Reviewed-by: joehw, mkos

Added tag jdk9-b48 for changeset a5c172165b3b

Merge

Merge

8051547: Convert JAXP function tests: javax.xml.validation.* to jtreg (testng) tests Reviewed-by: lancea, joehw Contributed-by: frank.yuan@oracle.com

8052401: JAXP function gap tests conversion Reviewed-by: lancea, joehw Contributed-by: frank.yuan@oracle.com

8054196: XPath: support any type Reviewed-by: alanb, lancea, dfuchs

8062923: XSL: Run-time internal error in 'substring()' 8062924: XSL: wrong answer from substring() function Reviewed-by: joehw

Added tag jdk9-b48 for changeset 5da8936a1a2c

Merge

Merge

8067139: Finally blocks inlined incorrectly Reviewed-by: hannesw, lagergren

Added tag jdk9-b48 for changeset 5f1e4deb8d30

Merge

Added tag jdk9-b48 for changeset bb8de1967725

Merge

8071959: java.lang.Object uses implicit default constructor Reviewed-by: lancea

Merge

8071434: doc updates for java.lang.Object Reviewed-by: rriggs

8068578: test/java/io/Serializable/subclassGC/SubclassGC.java assumes app class loader is a URLClassLoader Reviewed-by: alanb

8067105: Socket returned by ServerSocket.accept() is inherited by child process on Windows Reviewed-by: alanb, igerasim

8067680: (sctp) Possible race initializing native IDs Reviewed-by: chegar, rriggs

8042397: tmtools/jmap/heap_config/jmap_heap_config_OldSize fails Summary: rewrite the test to jtreg Reviewed-by: ykantser, jbachorik

Merge

Merge

Merge

8068234: java/lang/instrument/NativeMethodPrefixAgent.java is still in exclude list Reviewed-by: kvn, iignatyev

Merge

8067751: OOMEInReferenceHandler.java fails: Cleaner terminated abnormally Summary: OOME with message "GC overhead limit exceeded". -XX:-UseGCOverheadLimit was added to avoid OOME in resource handler. Reviewed-by: jmasa, jwilhelm Contributed-by: michail.chernov@oracle.com

Merge

8054494: Remove sun.misc.Unsafe.monitorEnter, monitorExit and tryMonitorEnter Reviewed-by: dholmes, coleenp Contributed-by: paul.sandoz@oracle.com, peter.levart@gmail.com

8022582: Relax response flags checking in sun.security.krb5.KrbKdcRep.check. Reviewed-by: mullan

8065178: test/java/util/ResourceBundle/Bug6287579.java needs update for per language package support Reviewed-by: naoto, peytoia

8069269: (spec) Defect in the System.nanoTime spec Summary: Change the description of how to compare two nanoTime values. Reviewed-by: martin

8071477: Better Spliterator implementations for String.chars() and String.codePoints() Reviewed-by: sherman

8032513: The Spliterator characteristics CONCURRENT and IMMUTABLE are mutually exclusive Reviewed-by: chegar, lancea, dfuchs

8071481: (Process) Merge UNIXProcess.java into ProcessImpl.java Summary: simplify source files for Unix Process implementation Reviewed-by: plevart, chegar

8071562: TimestampCheck.java change removes a whitespace between command and args Reviewed-by: alanb

8071424: JCK test api/java_net/Socket/descriptions.html#Bind crashes on Windows Reviewed-by: alanb

8049171: Additional tests for jarsigner's warnings Reviewed-by: weijun

8046817: JDK 8 schemagen tool does not generate xsd files for enum types Reviewed-by: joehw, mkos

8069261: Create make dependencies on make variable values Reviewed-by: ihse

8062923: XSL: Run-time internal error in 'substring()' 8062924: XSL: wrong answer from substring() function Reviewed-by: joehw

8055190: Cleanup include and exclude of core-libs native libraries after source code restructure Reviewed-by: alanb

8055045: StringIndexOutOfBoundsException while reading krb5.conf Reviewed-by: mullan

Added tag jdk9-b48 for changeset 6d99e9b8dbe5

Merge

Merge

Merge

Merge

Merge

8059606: Enable per-method usage of CompileThresholdScaling (per-method compilation thresholds) Summary: Changed interpreter and compilation policies to allow using CompileThresholdScaling on a per-method level Reviewed-by: jrose, kvn

8069162: quarantine serviceability/dcmd/compiler/CompilerQueueTest.java Summary: Added '@ignore 8069160' to the test. Reviewed-by: anoll, kvn

8068881: SIGBUS in C2 compiled method weblogic.wsee.jaxws.framework.jaxrpc.EnvironmentFactory$SimulatedWsdlDefinitions.<init> Summary: Use MachMerge to hook together defs of the same multidef value in a block Reviewed-by: kvn, vlivanov

Merge

8068231: Several tests are still excluded Reviewed-by: kvn, iignatyev

8068385: [TESTBUG] hotspot/test/compiler/codecache/jmx/PoolsIndependenceTest.java sometimes fails(unstable behaviour) Summary: fixing unstable behaviour of 2 tests Reviewed-by: iignatyev

Merge

8066312: Add new Node* Node::find_out(int opc) method. Summary: Added methods find_user_with() and has_user_with() for searching for a particular out type. Reviewed-by: kvn, jrose

8068909: SIGSEGV in c2 compiled code with OptimizeStringConcat Reviewed-by: kvn

Merge

8067374: Use %f instead of %g for LogCompilation output Summary: Changed format string from %g to %f. Reviewed-by: kvn

8068864: C2 failed: modified node is not on IGVN._worklist Summary: Use igvn.replace_input_of() instead of set_req(). Reviewed-by: iveresov, vlivanov

Merge

8069230: Remove unused G1PostBarrierStub::byte_map_base and friends Reviewed-by: brutisso, tschatzl

Merge

8069011: gc/TestSmallHeap.java failing in nightly Summary: Using @requires to avoid running with AggressiveOpts turned on. Reviewed-by: jwilhelm, brutisso

8040935: -XX:+AggressiveOpts broken: GC triggered before VM initialization completed on several tests Reviewed-by: brutisso, kbarrett

8068971: A heap region being cleared should not belong to the cset Reviewed-by: brutisso, tschatzl

Merge

8066875: VirtualSpace does not use large pages Reviewed-by: stefank, tschatzl, anoll, thartmann

8061259: ParNew promotion failed is serialized on a lock Reviewed-by: kbarrett, brutisso Contributed-by: jwha@google.com

8068026: [TESTBUG] Check for -client in gc/g1/TestHumongousCodeCacheRoots.java Summary: Skip test if -client is not supported. Reviewed-by: jwilhelm, simonis Contributed-by: goetz.lindenmaier@sap.com

8067479: verify-modules fails in bootcycle build Reviewed-by: dholmes, sla

8069048: (process) Suspend finishing threads when process exits [win] Reviewed-by: dholmes, dcubed

Merge

8035938: Memory leak in JvmtiEnv::GetConstantPool Reviewed-by: sspitsyn, dcubed

6584008: jvmtiStringPrimitiveCallback should not be invoked when string value is null Reviewed-by: sla, sspitsyn

8062961: [TESTBUG] Spurious timeout for runtime/ErrorHandling/ProblematicFrameTest Reviewed-by: coleenp, gtriantafill

Merge

8054494: Remove sun.misc.Unsafe.monitorEnter, monitorExit and tryMonitorEnter Reviewed-by: dholmes, coleenp Contributed-by: paul.sandoz@oracle.com, filipp.zhinkin@gmail.com

Merge

Merge

7076820: assert(addr != 0) failed: address sanity check in PerfMemory::detach with -XX:-UsePerfData Summary: Explicitly checks for UsePerfData and if it's false make Perf:detach a NOP. Reviewed-by: dholmes, jbachorik

8068503: ppc64: Encode/Decode nodes for disjoint cOops mode Reviewed-by: simonis

Merge

8067982: Some jcmd /gc/heap_dump tests failed: hprof output contains warning or error. Summary: Include shared symbols in SymbolTable::symbols_do(SymbolClosure). Reviewed-by: minqi, farvidsson, coleenp

Merge

8065576: Enable pipefail in the shell used by make to better detect build errors Reviewed-by: ihse, tbell, martin

8055146: Split Verifier incorrectly throws VerifyError for getstatic of an array field Summary: Allow fieldClass for getstatic and putstatic to be an array Reviewed-by: dholmes, acorn