I've just started tests with xloader. It aborts with

17:21:56 INFO  Data            :: Triples = 10,000,000 ; Quads = 0
17:21:57 INFO  =-=-=-=-=-=-=-=
17:21:57 INFO
17:21:57 INFO  Build SPO
17:21:57 INFO  (Very long pause likely at this point)
17:21:58 INFO  Index           :: Build index SPO
java.lang.RuntimeException: org.apache.jena.tdb2.TDBException: Can't find gzip 
program
  at 
org.apache.jena.tdb2.xloader.ProcBuildIndexX.sort_build_index(ProcBuildIndexX.java:207)
  at 
org.apache.jena.tdb2.xloader.ProcBuildIndexX.buildIndex(ProcBuildIndexX.java:121)
  at 
org.apache.jena.tdb2.xloader.ProcBuildIndexX.exec2(ProcBuildIndexX.java:106)
  at org.apache.jena.tdb2.xloader.ProcBuildIndexX.exec(ProcBuildIndexX.java:94)
  at tdb2.xloader.CmdxBuildIndex.exec(CmdxBuildIndex.java:80)
  at org.apache.jena.cmd.CmdMain.mainMethod(CmdMain.java:92)
  at org.apache.jena.cmd.CmdMain.mainRun(CmdMain.java:58)
  at org.apache.jena.cmd.CmdMain.mainRun(CmdMain.java:45)
  at tdb2.xloader.CmdxBuildIndex.main(CmdxBuildIndex.java:28)
Caused by: org.apache.jena.tdb2.TDBException: Can't find gzip program
  at org.apache.jena.tdb2.xloader.BulkLoaderX.gzipProgram(BulkLoaderX.java:67)
  at 
org.apache.jena.tdb2.xloader.ProcBuildIndexX.sort_build_index(ProcBuildIndexX.java:183)
  ... 8 more

Of course, /usr/bin/gzip is in the path. My configuration is below, 
tdb2.xloader was called with --threads=12.

Any idea what could be wrong?

Cheers, Joachim


Configuration:
openjdk version "11.0.13" 2021-10-19 LTS
OpenJDK Runtime Environment 18.9 (build 11.0.13+8-LTS)
OpenJDK 64-Bit Server VM 18.9 (build 11.0.13+8-LTS, mixed mode, sharing)
JAVA_OPTS: -d64 -Xmx12G
Loader: tdb2.xloader
Jena:       VERSION: 4.4.0
Jena:       BUILD_DATE: 2022-01-30T15:09:41Z
ARQ:        VERSION: 4.4.0
ARQ:        BUILD_DATE: 2022-01-30T15:09:41Z
TDB:        VERSION: 4.4.0
TDB:        BUILD_DATE: 2022-01-30T15:09:41Z

Use fuseki tdb2.xloader on file /zbw/var/wikidata/2022-02-03/rdf/test.nt.gz
17:20:13 INFO  Setup:
17:20:13 INFO    Database: /zbw/var/lib/fuseki/databases/temp
17:20:13 INFO    Data:     /zbw/var/wikidata/2022-02-03/rdf/test.nt.gz
17:20:13 INFO    TMPDIR:   /zbw/var/lib/fuseki/databases/temp
17:20:13 INFO
17:20:13 INFO  Load node table


--
Joachim Neubert

ZBW - Leibniz Information Centre for Economics
Neuer Jungfernstieg 21
20354 Hamburg
Phone +49-40-42834-462

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