[
https://issues.apache.org/jira/browse/NUTCH-1188?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Zhang JinYan updated NUTCH-1188:
--------------------------------
Description:
LogUtil has static fields,which is initialized like this:
FATAL = Logger.class.getMethod("error", new Class[] { Object.class });
but the Logger has no such method，the correct method is：
void org.slf4j.Logger.error(String msg)
So，LogUtil's static fields are not initialized correctly(they are null)
-------------------------------
Run crawl，you will find msg in hadoop.log：
2011-11-01 22:38:14,442 ERROR util.LogUtil - Cannot log with method [null]
java.lang.NullPointerException
at org.apache.nutch.util.LogUtil$1.flush(LogUtil.java:103)
at java.io.PrintStream.write(PrintStream.java:432)
at sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:202)
at sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:272)
at sun.nio.cs.StreamEncoder.flushBuffer(StreamEncoder.java:85)
at java.io.OutputStreamWriter.flushBuffer(OutputStreamWriter.java:168)
at java.io.PrintStream.newLine(PrintStream.java:496)
at java.io.PrintStream.println(PrintStream.java:757)
at java.lang.Throwable.printStackTraceAsCause(Throwable.java:492)
at java.lang.Throwable.printStackTrace(Throwable.java:468)
at
org.apache.nutch.protocol.http.api.HttpBase.getProtocolOutput(HttpBase.java:197)
at org.apache.nutch.fetcher.Fetcher$FetcherThread.run(Fetcher.java:665)
----------------------------
Patch:
FATAL = Logger.class.getMethod("error", new Class[] { String.class });
was:
LogUtil has static fields,which is initialized like this:
FATAL = Logger.class.getMethod("error", new Class[] { Object.class });
but the Logger has no such method，the correct method is：
void org.slf4j.Logger.error(String msg)
So，LogUtil's static fields are not initialized correctly(they are null)
Run crawl，you will find msg in hadoop.log：
2011-11-01 22:38:14,442 ERROR util.LogUtil - Cannot log with method [null]
java.lang.NullPointerException
at org.apache.nutch.util.LogUtil$1.flush(LogUtil.java:103)
at java.io.PrintStream.write(PrintStream.java:432)
at sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:202)
at sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:272)
at sun.nio.cs.StreamEncoder.flushBuffer(StreamEncoder.java:85)
at java.io.OutputStreamWriter.flushBuffer(OutputStreamWriter.java:168)
at java.io.PrintStream.newLine(PrintStream.java:496)
at java.io.PrintStream.println(PrintStream.java:757)
at java.lang.Throwable.printStackTraceAsCause(Throwable.java:492)
at java.lang.Throwable.printStackTrace(Throwable.java:468)
at
org.apache.nutch.protocol.http.api.HttpBase.getProtocolOutput(HttpBase.java:197)
at org.apache.nutch.fetcher.Fetcher$FetcherThread.run(Fetcher.java:665)
> ERROR util.LogUtil - Cannot log with method [null]
> --------------------------------------------------
>
> Key: NUTCH-1188
> URL: https://issues.apache.org/jira/browse/NUTCH-1188
> Project: Nutch
> Issue Type: Bug
> Components: fetcher
> Affects Versions: 1.4
> Environment: no special enviroment
> Reporter: Zhang JinYan
>
> LogUtil has static fields,which is initialized like this:
> FATAL = Logger.class.getMethod("error", new Class[] { Object.class });
> but the Logger has no such method，the correct method is：
> void org.slf4j.Logger.error(String msg)
> So，LogUtil's static fields are not initialized correctly(they are null)
> -------------------------------
> Run crawl，you will find msg in hadoop.log：
> 2011-11-01 22:38:14,442 ERROR util.LogUtil - Cannot log with method [null]
> java.lang.NullPointerException
> at org.apache.nutch.util.LogUtil$1.flush(LogUtil.java:103)
> at java.io.PrintStream.write(PrintStream.java:432)
> at sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:202)
> at sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:272)
> at sun.nio.cs.StreamEncoder.flushBuffer(StreamEncoder.java:85)
> at java.io.OutputStreamWriter.flushBuffer(OutputStreamWriter.java:168)
> at java.io.PrintStream.newLine(PrintStream.java:496)
> at java.io.PrintStream.println(PrintStream.java:757)
> at java.lang.Throwable.printStackTraceAsCause(Throwable.java:492)
> at java.lang.Throwable.printStackTrace(Throwable.java:468)
> at
> org.apache.nutch.protocol.http.api.HttpBase.getProtocolOutput(HttpBase.java:197)
> at org.apache.nutch.fetcher.Fetcher$FetcherThread.run(Fetcher.java:665)
> ----------------------------
> Patch:
> FATAL = Logger.class.getMethod("error", new Class[] { String.class });
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