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8064814: Print more helpful error message when getting OOM due to low Java Heap base when running with CompressedOops

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Improve OOM error message

Reviewed-by: coleenp, dholmes
This commit is contained in:
Poonam Bajaj 2016-07-01 12:51:29 -07:00
parent cc6f87129a
commit f97651b356
1 changed files with 25 additions and 2 deletions
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27
hotspot/src/share/vm/utilities/vmError.cpp
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@ -205,16 +205,39 @@ void VMError::print_stack_trace(outputStream* st, JavaThread* jt,
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.");
}