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Bug
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Resolution: Fixed
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P3
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11, 15
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b16
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x86_64
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windows_10
ADDITIONAL SYSTEM INFORMATION :
$ java --version
openjdk 11.0.3 2019-04-16 LTS
OpenJDK Runtime Environment Zulu11.31+11-CA (build 11.0.3+7-LTS)
OpenJDK 64-Bit Server VM Zulu11.31+11-CA (build 11.0.3+7-LTS, mixed mode)
A DESCRIPTION OF THE PROBLEM :
After upgrading from Java 8 to 11, we started seeing OOM errors when parsing HTML files with a large <pre> tag text. The test program below works fine under Java 8, but terminates with an OutOfMemoryError under Java 9 or later. If the <pre> tag text is *not* '\n' separated, it works in all versions of Java.
We have tracked down the problem to a change originally committed to Java 9:
https://github.com/openjdk/jdk/commit/17679435a174f6a7f0e450309dc8775e77df968a
STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
import java.io.StringReader;
import javax.swing.text.html.HTMLEditorKit;
public class Test {
public static void main(String[] args) throws Exception {
StringBuilder html = new StringBuilder();
html.append("<html><body><pre>");
for (int i = 0; i < 10_000; i++) {
html.append("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
.append("\n");
}
html.append("</pre></body></html>");
HTMLEditorKit kit = new HTMLEditorKit();
kit.read(new StringReader(html.toString()), kit.createDefaultDocument(), 0);
}
}
EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The test program should exit normally.
ACTUAL -
$ java Test.java
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
at java.base/java.util.Arrays.copyOf(Arrays.java:3841)
at java.desktop/javax.swing.text.DefaultStyledDocument$ElementSpec.<init>(DefaultStyledDocument.java:1267)
at java.desktop/javax.swing.text.html.HTMLDocument$HTMLReader.addContent(HTMLDocument.java:3909)
at java.desktop/javax.swing.text.html.HTMLDocument$HTMLReader.addContent(HTMLDocument.java:3883)
at java.desktop/javax.swing.text.html.HTMLDocument$HTMLReader.preContent(HTMLDocument.java:3787)
at java.desktop/javax.swing.text.html.HTMLDocument$HTMLReader.handleText(HTMLDocument.java:2766)
at java.desktop/javax.swing.text.html.parser.DocumentParser.handleText(DocumentParser.java:271)
at java.desktop/javax.swing.text.html.parser.Parser.handleText(Parser.java:409)
at java.desktop/javax.swing.text.html.parser.Parser.endTag(Parser.java:524)
at java.desktop/javax.swing.text.html.parser.Parser.parseTag(Parser.java:1934)
at java.desktop/javax.swing.text.html.parser.Parser.parseContent(Parser.java:2195)
at java.desktop/javax.swing.text.html.parser.Parser.parse(Parser.java:2372)
at java.desktop/javax.swing.text.html.parser.DocumentParser.parse(DocumentParser.java:135)
at java.desktop/javax.swing.text.html.parser.ParserDelegator.parse(ParserDelegator.java:113)
at java.desktop/javax.swing.text.html.HTMLEditorKit.read(HTMLEditorKit.java:263)
at Test.main(Test.java:16)
---------- BEGIN SOURCE ----------
import java.io.StringReader;
import javax.swing.text.html.HTMLEditorKit;
public class Test {
public static void main(String[] args) throws Exception {
StringBuilder html = new StringBuilder();
html.append("<html><body><pre>");
for (int i = 0; i < 10_000; i++) {
html.append("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
.append("\n");
}
html.append("</pre></body></html>");
HTMLEditorKit kit = new HTMLEditorKit();
kit.read(new StringReader(html.toString()), kit.createDefaultDocument(), 0);
}
}
---------- END SOURCE ----------
$ java --version
openjdk 11.0.3 2019-04-16 LTS
OpenJDK Runtime Environment Zulu11.31+11-CA (build 11.0.3+7-LTS)
OpenJDK 64-Bit Server VM Zulu11.31+11-CA (build 11.0.3+7-LTS, mixed mode)
A DESCRIPTION OF THE PROBLEM :
After upgrading from Java 8 to 11, we started seeing OOM errors when parsing HTML files with a large <pre> tag text. The test program below works fine under Java 8, but terminates with an OutOfMemoryError under Java 9 or later. If the <pre> tag text is *not* '\n' separated, it works in all versions of Java.
We have tracked down the problem to a change originally committed to Java 9:
https://github.com/openjdk/jdk/commit/17679435a174f6a7f0e450309dc8775e77df968a
STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
import java.io.StringReader;
import javax.swing.text.html.HTMLEditorKit;
public class Test {
public static void main(String[] args) throws Exception {
StringBuilder html = new StringBuilder();
html.append("<html><body><pre>");
for (int i = 0; i < 10_000; i++) {
html.append("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
.append("\n");
}
html.append("</pre></body></html>");
HTMLEditorKit kit = new HTMLEditorKit();
kit.read(new StringReader(html.toString()), kit.createDefaultDocument(), 0);
}
}
EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The test program should exit normally.
ACTUAL -
$ java Test.java
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
at java.base/java.util.Arrays.copyOf(Arrays.java:3841)
at java.desktop/javax.swing.text.DefaultStyledDocument$ElementSpec.<init>(DefaultStyledDocument.java:1267)
at java.desktop/javax.swing.text.html.HTMLDocument$HTMLReader.addContent(HTMLDocument.java:3909)
at java.desktop/javax.swing.text.html.HTMLDocument$HTMLReader.addContent(HTMLDocument.java:3883)
at java.desktop/javax.swing.text.html.HTMLDocument$HTMLReader.preContent(HTMLDocument.java:3787)
at java.desktop/javax.swing.text.html.HTMLDocument$HTMLReader.handleText(HTMLDocument.java:2766)
at java.desktop/javax.swing.text.html.parser.DocumentParser.handleText(DocumentParser.java:271)
at java.desktop/javax.swing.text.html.parser.Parser.handleText(Parser.java:409)
at java.desktop/javax.swing.text.html.parser.Parser.endTag(Parser.java:524)
at java.desktop/javax.swing.text.html.parser.Parser.parseTag(Parser.java:1934)
at java.desktop/javax.swing.text.html.parser.Parser.parseContent(Parser.java:2195)
at java.desktop/javax.swing.text.html.parser.Parser.parse(Parser.java:2372)
at java.desktop/javax.swing.text.html.parser.DocumentParser.parse(DocumentParser.java:135)
at java.desktop/javax.swing.text.html.parser.ParserDelegator.parse(ParserDelegator.java:113)
at java.desktop/javax.swing.text.html.HTMLEditorKit.read(HTMLEditorKit.java:263)
at Test.main(Test.java:16)
---------- BEGIN SOURCE ----------
import java.io.StringReader;
import javax.swing.text.html.HTMLEditorKit;
public class Test {
public static void main(String[] args) throws Exception {
StringBuilder html = new StringBuilder();
html.append("<html><body><pre>");
for (int i = 0; i < 10_000; i++) {
html.append("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
.append("\n");
}
html.append("</pre></body></html>");
HTMLEditorKit kit = new HTMLEditorKit();
kit.read(new StringReader(html.toString()), kit.createDefaultDocument(), 0);
}
}
---------- END SOURCE ----------
- relates to
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- Closed
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