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HBASE-17869 UnsafeAvailChecker wrongly returns false on ppc

This commit is contained in:
Jerry He 2017-04-06 16:04:47 -07:00
parent a6e9de3a0e
commit b6a2c02b93
1 changed files with 15 additions and 9 deletions
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24
hbase-common/src/main/java/org/apache/hadoop/hbase/util/UnsafeAvailChecker.java
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@ -51,15 +51,21 @@ public class UnsafeAvailChecker {
});
// When Unsafe itself is not available/accessible consider unaligned as false.
if (avail) {
try {
// Using java.nio.Bits#unaligned() to check for unaligned-access capability
Class<?> clazz = Class.forName("java.nio.Bits");
Method m = clazz.getDeclaredMethod("unaligned");
m.setAccessible(true);
unaligned = (Boolean) m.invoke(null);
} catch (Exception e) {
LOG.warn("java.nio.Bits#unaligned() check failed."
+ "Unsafe based read/write of primitive types won't be used", e);
String arch = System.getProperty("os.arch");
if ("ppc64".equals(arch) || "ppc64le".equals(arch)) {
// java.nio.Bits.unaligned() wrongly returns false on ppc (JDK-8165231),
unaligned = true;
} else {
try {
// Using java.nio.Bits#unaligned() to check for unaligned-access capability
Class<?> clazz = Class.forName("java.nio.Bits");
Method m = clazz.getDeclaredMethod("unaligned");
m.setAccessible(true);
unaligned = (Boolean) m.invoke(null);
} catch (Exception e) {
LOG.warn("java.nio.Bits#unaligned() check failed."
+ "Unsafe based read/write of primitive types won't be used", e);
}
}
}
}