[hbase20] no slf4j implementation; hbase client doesn't log

[busbey]

running through testing the hbase20 binding, there's no logs from the client library (as there are in the earlier bindings).

Loading workload...
Starting test.
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
DBWrapper: report latency for each error is false and specific error codes to track for latency are: []

Looks like the hbase 1.2 and hbase 1.4 shaded jars incorrectly included a dependency on the slf4j-log4j12 bridge. so to have the same logging on the hbase 2.0 client we'll need to add it.

[busbey]

As a workaround, you can download the slf4j simple logger directly:

e.g. for the hbase 2.0 specific tarball:

(cd lib/ && curl -O 'https://search.maven.org/remotecontent?filepath=org/slf4j/slf4j-simple/1.7.25/slf4j-simple-1.7.25.jar')

for 0.15.0 you'd end up with

ycsb-hbase20-binding-0.15.0 busbey$ ls -lah lib/
total 96080
drwxr-xr-x  16 busbey  staff   512B Sep 11 08:20 .
drwxr-xr-x   8 busbey  staff   256B Sep 11 08:20 ..
-rw-r--r--@  1 busbey  staff   102K May 12  2017 HdrHistogram-2.1.4.jar
-rw-r--r--@  1 busbey  staff    20K Jul 11  2017 audience-annotations-0.5.0.jar
-rw-r--r--@  1 busbey  staff    61K Dec  1  2016 commons-logging-1.1.3.jar
-rw-r--r--@  1 busbey  staff   143K Aug 13 22:25 core-0.15.0.jar
-rw-r--r--@  1 busbey  staff    15K Nov 29  2016 findbugs-annotations-1.3.9-1.jar
-rw-r--r--@  1 busbey  staff    44M Jul 15 20:55 hbase-shaded-client-2.0.0.jar
-rw-r--r--@  1 busbey  staff   8.7K Aug 13 22:32 hbase10-binding-0.15.0.jar
-rw-r--r--@  1 busbey  staff   3.1K Aug 13 22:32 hbase20-binding-0.15.0.jar
-rw-r--r--@  1 busbey  staff   1.4M Dec  2  2016 htrace-core4-4.1.0-incubating.jar
-rw-r--r--@  1 busbey  staff   223K May 12  2017 jackson-core-asl-1.9.4.jar
-rw-r--r--@  1 busbey  staff   759K May 12  2017 jackson-mapper-asl-1.9.4.jar
-rw-r--r--@  1 busbey  staff   478K Nov 29  2016 log4j-1.2.17.jar
-rw-r--r--@  1 busbey  staff    40K May  4  2017 slf4j-api-1.7.25.jar
-rw-r--r--   1 busbey  staff    15K Sep 11 08:20 slf4j-simple-1.7.25.jar

similarly, for the full YCSB tarball:

(cd hbase20-binding/lib && curl -O 'https://search.maven.org/remotecontent?filepath=org/slf4j/slf4j-simple/1.7.25/slf4j-simple-1.7.25.jar')

for 0.15.0 you'd end up with

ycsb-0.15.0 busbey$ ls -lah hbase20-binding/lib/
total 93616
drwxr-xr-x@ 12 busbey  staff   384B Sep 11 08:22 .
drwxr-xr-x   4 busbey  staff   128B Sep 11 08:16 ..
-rw-r--r--@  1 busbey  staff    20K Aug 13 22:32 audience-annotations-0.5.0.jar
-rw-r--r--@  1 busbey  staff    61K Aug 13 22:32 commons-logging-1.1.3.jar
-rw-r--r--@  1 busbey  staff    15K Aug 13 22:32 findbugs-annotations-1.3.9-1.jar
-rw-r--r--@  1 busbey  staff    44M Aug 13 22:32 hbase-shaded-client-2.0.0.jar
-rw-r--r--@  1 busbey  staff   8.7K Aug 13 22:32 hbase10-binding-0.15.0.jar
-rw-r--r--@  1 busbey  staff   3.1K Aug 13 22:32 hbase20-binding-0.15.0.jar
-rw-r--r--@  1 busbey  staff   1.4M Aug 13 22:32 htrace-core4-4.1.0-incubating.jar
-rw-r--r--@  1 busbey  staff   478K Aug 13 22:32 log4j-1.2.17.jar
-rw-r--r--@  1 busbey  staff    40K Aug 13 22:32 slf4j-api-1.7.25.jar
-rw-r--r--   1 busbey  staff    15K Sep 11 08:22 slf4j-simple-1.7.25.jar

[sanxiago]

curl -L -O 'https://search.maven.org/remotecontent?filepath=org/slf4j/slf4j-simple/1.7.25/slf4j-simple-1.7.25.jar'

Looks like the maven.org has a redirect, using -L gets to the actual jar.