changeset 39626:f611156cf276

8064814: Print more helpful error message when getting OOM due to low Java Heap base when running with CompressedOops Summary: Improve OOM error message Reviewed-by: coleenp, dholmes
author poonam
date Fri, 01 Jul 2016 12:51:29 -0700
parents 548370ed7f2a
children 835fb9cfc34f
files hotspot/src/share/vm/utilities/vmError.cpp
diffstat 1 files changed, 25 insertions(+), 2 deletions(-) [+]
line wrap: on
line diff
--- a/hotspot/src/share/vm/utilities/vmError.cpp	Fri Jul 01 13:39:36 2016 +0200
+++ b/hotspot/src/share/vm/utilities/vmError.cpp	Fri Jul 01 12:51:29 2016 -0700
@@ -205,16 +205,39 @@
 static void print_oom_reasons(outputStream* st) {
   st->print_cr("# Possible reasons:");
   st->print_cr("#   The system is out of physical RAM or swap space");
-  st->print_cr("#   In 32 bit mode, the process size limit was hit");
+  if (UseCompressedOops) {
+    st->print_cr("#   The process is running with CompressedOops enabled, and the Java Heap may be blocking the growth of the native heap");
+  }
+  if (LogBytesPerWord == 2) {
+    st->print_cr("#   In 32 bit mode, the process size limit was hit");
+  }
   st->print_cr("# Possible solutions:");
   st->print_cr("#   Reduce memory load on the system");
   st->print_cr("#   Increase physical memory or swap space");
   st->print_cr("#   Check if swap backing store is full");
-  st->print_cr("#   Use 64 bit Java on a 64 bit OS");
+  if (LogBytesPerWord == 2) {
+    st->print_cr("#   Use 64 bit Java on a 64 bit OS");
+  }
   st->print_cr("#   Decrease Java heap size (-Xmx/-Xms)");
   st->print_cr("#   Decrease number of Java threads");
   st->print_cr("#   Decrease Java thread stack sizes (-Xss)");
   st->print_cr("#   Set larger code cache with -XX:ReservedCodeCacheSize=");
+  if (UseCompressedOops) {
+    switch (Universe::narrow_oop_mode()) {
+      case Universe::UnscaledNarrowOop:
+        st->print_cr("#   JVM is running with Unscaled Compressed Oops mode in which the Java heap is");
+        st->print_cr("#     placed in the first 4GB address space. The Java Heap base address is the");
+        st->print_cr("#     maximum limit for the native heap growth. Please use -XX:HeapBaseMinAddress");
+        st->print_cr("#     to set the Java Heap base and to place the Java Heap above 4GB virtual address.");
+        break;
+      case Universe::ZeroBasedNarrowOop:
+        st->print_cr("#   JVM is running with Zero Based Compressed Oops mode in which the Java heap is");
+        st->print_cr("#     placed in the first 32GB address space. The Java Heap base address is the");
+        st->print_cr("#     maximum limit for the native heap growth. Please use -XX:HeapBaseMinAddress");
+        st->print_cr("#     to set the Java Heap base and to place the Java Heap above 32GB virtual address.");
+        break;
+    }
+  }
   st->print_cr("# This output file may be truncated or incomplete.");
 }