Andrzej Bialecki created TIKA-1568:
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Summary: TXTParser performance problem
Key: TIKA-1568
URL: https://issues.apache.org/jira/browse/TIKA-1568
Project: Tika
Issue Type: Bug
Affects Versions: 1.7
Reporter: Andrzej Bialecki
Performance of parsing many plain text files suffers from repeated calls to
ServiceLoader.loadServiceProviders(EncodingDetector.class). In most cases, when
Tika is using the default ServiceLoader instance created in TXTParser, this
cost can be avoided by caching the resulting List<EncodingDetector> either at a
higher level in TXTParser (e.g. by putting it in ParsingContext) or at a lower
level in ServiceLoader.
Relevant part of the stacktrace follows:
{code}
java.lang.Thread.State: BLOCKED (on object monitor)
at java.util.zip.ZipFile.getEntry(ZipFile.java:304)
- locked <0x00000007909d2e48> (a java.util.jar.JarFile)
at java.util.jar.JarFile.getEntry(JarFile.java:227)
at java.util.jar.JarFile.getJarEntry(JarFile.java:210)
at sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:840)
at sun.misc.URLClassPath$JarLoader.findResource(URLClassPath.java:818)
at sun.misc.URLClassPath$1.next(URLClassPath.java:226)
at sun.misc.URLClassPath$1.hasMoreElements(URLClassPath.java:236)
at java.net.URLClassLoader$3$1.run(URLClassLoader.java:583)
at java.net.URLClassLoader$3$1.run(URLClassLoader.java:581)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader$3.next(URLClassLoader.java:580)
at java.net.URLClassLoader$3.hasMoreElements(URLClassLoader.java:605)
at java.util.Collections.list(Collections.java:3687)
at
org.eclipse.jetty.webapp.WebAppClassLoader.toList(WebAppClassLoader.java:337)
at
org.eclipse.jetty.webapp.WebAppClassLoader.getResources(WebAppClassLoader.java:321)
at
org.apache.tika.config.ServiceLoader.findServiceResources(ServiceLoader.java:210)
at
org.apache.tika.config.ServiceLoader.identifyStaticServiceProviders(ServiceLoader.java:277)
at
org.apache.tika.config.ServiceLoader.loadStaticServiceProviders(ServiceLoader.java:306)
at
org.apache.tika.config.ServiceLoader.loadServiceProviders(ServiceLoader.java:228)
at
org.apache.tika.detect.AutoDetectReader.<init>(AutoDetectReader.java:104)
at org.apache.tika.parser.txt.TXTParser.parse(TXTParser.java:70)
at
org.apache.tika.parser.CompositeParser.parse(CompositeParser.java:244)
at org.apache.tika.parser.ParserDecorator.parse(ParserDecorator.java:91)
...
{code}
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