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LUCENE-4711: workaround to J9 1.7.0 JIT bug 

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1439327 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Shai Erera 2013-01-28 10:12:09 +00:00
parent 6b3823e6a3
commit bb6a447c77
1 changed files with 3 additions and 17 deletions
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18
lucene/facet/src/java/org/apache/lucene/facet/taxonomy/CategoryPath.java
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@ -1,6 +1,5 @@
package org.apache.lucene.facet.taxonomy;
import org.apache.lucene.util.Constants;
/*
@ -28,10 +27,6 @@ import org.apache.lucene.util.Constants;
*/
public class CategoryPath implements Comparable<CategoryPath> {
// TODO: revisit when IBM releases Java 7 newer than SR3 (with a fix)
// to validate, run e.g. TestAssociationExample with -Dtests.iters=1000
private static final boolean IS_J9_JAVA7 = Constants.JRE_IS_MINIMUM_JAVA7 && Constants.JVM_VENDOR.contains("IBM");
/** An empty {@link CategoryPath} */
public static final CategoryPath EMPTY = new CategoryPath();
@ -48,7 +43,7 @@ public class CategoryPath implements Comparable<CategoryPath> {
// Used by singleton EMPTY
private CategoryPath() {
components = new String[0];
components = null;
length = 0;
}
@ -67,16 +62,7 @@ public class CategoryPath implements Comparable<CategoryPath> {
/** Construct from the given path components. */
public CategoryPath(final String... components) {
assert components.length > 0 : "use CategoryPath.EMPTY to create an empty path";
if (IS_J9_JAVA7) {
// On IBM J9 Java 1.7.0, if we do 'this.components = components', then
// at some point its length becomes 0 ... quite unexpectedly. If JIT is
// disabled, it doesn't happen. This bypasses the bug by copying the
// array (note, Arrays.copyOf did not help either!).
this.components = new String[components.length];
System.arraycopy(components, 0, this.components, 0, components.length);
} else {
this.components = components;
}
length = components.length;
}
@ -84,7 +70,7 @@ public class CategoryPath implements Comparable<CategoryPath> {
public CategoryPath(final String pathString, final char delimiter) {
String[] comps = pathString.split(Character.toString(delimiter));
if (comps.length == 1 && comps[0].isEmpty()) {
components = EMPTY.components;
components = null;
length = 0;
} else {
components = comps;