Jenny Qiu created SOLR-14236:
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Summary: 【solr】 A "org.apache.log4j.ConsoleAppender" object is not
assignable to a "org.apache.log4j.Appender" variable.
Key: SOLR-14236
URL: https://issues.apache.org/jira/browse/SOLR-14236
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Components: Server, SolrJ
Affects Versions: 4.10.1
Reporter: Jenny Qiu
Attachments: 微信截图_20200203224606.png
I have built the solr project through tomcat, but when I run the startup.bat it
tells me this:
{code:java}
log4j:ERROR A "org.apache.log4j.ConsoleAppender" object is not assignable to a
"org.apache.log4j.Appender" variable.
log4j:ERROR The class "org.apache.log4j.Appender" was loaded by
log4j:ERROR [org.powermock.core.classloader.MockClassLoader@16a40b2] whereas
object of type
{code}
I searched for many solutions online, but none works.
Then I thought maybe things went wrong with the files related to log4j, then I
deleted the *log4j-1.2.17.jar* in
_D:\FSP_20160630\apache-tomcat-8_0_9-solr4_10_1\webapps\solr\WEB-INF\lib_
because I can find exact {color:#FF0000}same{color} ones in
_D:\FSP_20160630\apache-tomcat-8_0_9-solr4_10_1\lib_
_!微信截图_20200203224606.png!_
But I need to mention that i have also deleted the other 3 files, or I will get
another error:
{code:java}
ContextListenerjava.lang.LinkageError: loader constraint violation: when
resolving method
"org.slf4j.impl.StaticLoggerBinder.getLoggerFactory()Lorg/slf4j/ILoggerFactory;"
the class loader 'org.apache.catalina.loader.WebappClassLoader@4d1cc3c3 (urls:
['], parents: [)'java.net.URLClassLoader@4fccd51b']) of the current class,
org/slf4j/LoggerFactory, and the class loader ...{code}
In conclusion, I have deleted all these 4 files, then the startup.bat can run
properly.
I don't know whether things will go south in the future...Are these files
useful in the solr\WEB-INF\lib? Can they be deleted like this?
Hope I can get some instructions, thx for your time!
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