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https://issues.apache.org/jira/browse/CASSANDRA-1462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12906085#action_12906085
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David King commented on CASSANDRA-1462:
---------------------------------------
After some investigation it looks like the actual exception is logged, but
after it's logged some number of times the summary is logged instead. Also, the
actual cause of the exception appears to be #1463
> Unexpected exceptions' stacktraces can be lost
> ----------------------------------------------
>
> Key: CASSANDRA-1462
> URL: https://issues.apache.org/jira/browse/CASSANDRA-1462
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Affects Versions: 0.6.5
> Reporter: David King
>
> o.a.c.thrift.Cassandra.login.process has a catch that looks like:
> } catch (Throwable th) {
> LOGGER.error("Internal error processing login", th);
> TApplicationException x = new
> TApplicationException(TApplicationException.INTERNAL_ERROR, "Internal error
> processing login");
> oprot.writeMessageBegin(new TMessage("login",
> TMessageType.EXCEPTION, seqid));
> x.write(oprot);
> oprot.writeMessageEnd();
> oprot.getTransport().flush();
> return;
> }
> Unfortunately this loses vital debugging information as it loses the stack
> trace associated with the exception. In particular it made tracking down the
> source of this very difficult:
> ERROR [pool-1-thread-9723] 2010-09-03 12:34:16,978 Cassandra.java (line 1659)
> Internal error processing batch_mutate
> java.lang.NullPointerException
> ERROR [pool-1-thread-9556] 2010-09-03 12:34:17,031 Cassandra.java (line 1659)
> Internal error processing batch_mutate
> java.lang.NullPointerException
> ERROR [pool-1-thread-9556] 2010-09-03 12:34:17,129 Cassandra.java (line 1659)
> Internal error processing batch_mutate
> java.lang.NullPointerException
> ERROR [pool-1-thread-9794] 2010-09-03 12:34:17,190 Cassandra.java (line 1659)
> Internal error processing batch_mutate
> java.lang.NullPointerException
> ERROR [pool-1-thread-9794] 2010-09-03 12:34:17,245 Cassandra.java (line 1659)
> Internal error processing batch_mutate
> java.lang.NullPointerException
> ERROR [pool-1-thread-9794] 2010-09-03 12:34:17,285 Cassandra.java (line 1659)
> Internal error processing batch_mutate
> java.lang.NullPointerException
> ERROR [pool-1-thread-9794] 2010-09-03 12:34:17,392 Cassandra.java (line 1659)
> Internal error processing batch_mutate
> java.lang.NullPointerException
> I'd like to file a bug for that one too, but I have no idea what caused it :)
> For reference, my log4j.properties:
> log4j.rootLogger=INFO,stdout,R
> # stdout
> log4j.appender.stdout=org.apache.log4j.ConsoleAppender
> log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
> log4j.appender.stdout.layout.ConversionPattern=%5p %d{HH:mm:ss,SSS} %m%n
> # rolling log file
> log4j.appender.R=org.apache.log4j.RollingFileAppender
> log4j.appender.file.maxFileSize=20MB
> log4j.appender.file.maxBackupIndex=50
> log4j.appender.R.layout=org.apache.log4j.PatternLayout
> log4j.appender.R.layout.ConversionPattern=%5p [%t] %d{ISO8601} %F (line %L)
> %m%n
> # Edit the next line to point to your logs directory
> log4j.appender.R.File=/cassandra/log/system.log
> # Application logging options
> #log4j.logger.com.facebook=DEBUG
> #log4j.logger.com.facebook.infrastructure.gms=DEBUG
> #log4j.logger.com.facebook.infrastructure.db=DEBUG
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