Hi Sean, We're not using log4j actually, we're trying to redirect all logging to slf4j which then uses logback as the logging implementation.
The fix you mentioned - am I right to assume it is not part of the latest released Spark version (0.9.0)? If so, are there any workarounds or advices on how to avoid this issue in 0.9.0? -- Best regards, Sergey Parhomenko On 5 March 2014 14:40, Sean Owen <so...@cloudera.com> wrote: > Yes I think that issue is fixed (Patrick you had the last eyes on it IIRC?) > > If you are using log4j, in general, do not redirect log4j to slf4j. > Stuff using log4j is already using log4j, done. > -- > Sean Owen | Director, Data Science | London > > > On Wed, Mar 5, 2014 at 1:12 PM, Sergey Parhomenko <sparhome...@gmail.com> > wrote: > > Hi, > > > > I'm trying to redirect Spark logs to slf4j. Spark seem to be using > Log4J, so > > I did the typical steps of forcing a Log4J-based framework to use slf4j - > > manually excluded slf4j-log4j12 and log4j, and included log4j-over-slf4j. > > When doing that however Spark starts failing on initialization with: > > java.lang.StackOverflowError > > at java.lang.ThreadLocal.access$400(ThreadLocal.java:72) > > at java.lang.ThreadLocal$ThreadLocalMap.getEntry(ThreadLocal.java:376) > > at java.lang.ThreadLocal$ThreadLocalMap.access$000(ThreadLocal.java:261) > > at java.lang.ThreadLocal.get(ThreadLocal.java:146) > > at java.lang.StringCoding.deref(StringCoding.java:63) > > at java.lang.StringCoding.encode(StringCoding.java:330) > > at java.lang.String.getBytes(String.java:916) > > at java.io.UnixFileSystem.getBooleanAttributes0(Native Method) > > at java.io.UnixFileSystem.getBooleanAttributes(UnixFileSystem.java:242) > > at java.io.File.exists(File.java:813) > > at sun.misc.URLClassPath$FileLoader.getResource(URLClassPath.java:1080) > > at sun.misc.URLClassPath$FileLoader.findResource(URLClassPath.java:1047) > > at sun.misc.URLClassPath.findResource(URLClassPath.java:176) > > at java.net.URLClassLoader$2.run(URLClassLoader.java:551) > > at java.net.URLClassLoader$2.run(URLClassLoader.java:549) > > at java.security.AccessController.doPrivileged(Native Method) > > at java.net.URLClassLoader.findResource(URLClassLoader.java:548) > > at java.lang.ClassLoader.getResource(ClassLoader.java:1147) > > at org.apache.spark.Logging$class.initializeLogging(Logging.scala:109) > > at org.apache.spark.Logging$class.initializeIfNecessary(Logging.scala:97) > > at org.apache.spark.Logging$class.log(Logging.scala:36) > > at org.apache.spark.util.Utils$.log(Utils.scala:47) > > <last 4 lines repeated many, many times> > > > > There's some related work done in SPARK-1071, but it was resolved after > > 0.9.0 was released. In the last comment Sean refers to a > StackOverflowError > > which was discussed in the mailing list, I assume it might be a problem > > similar to mine but I was not able to find that discussion. > > Is anyone aware of a way to redirect Spark 0.9.0 logs to slf4j? > > > > -- > > Best regards, > > Sergey Parhomenko >
