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ZeroCM / zcm

Zero Communications and Marshalling
http://zerocm.github.io/zcm/
GNU Lesser General Public License v2.1
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zcm-spy: Unrecognized option: -Xincgc #199

Closed sudhanvas closed 6 years ago

sudhanvas commented 6 years ago

Once I compiled the code to run an example publish script and tried to run zcm-spy, I saw the following error:

Unrecognized option: -Xincgc
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

But removing -Xincgc in zcm-spy.in works just fine for me. I'm not entirely sure what the option does but it might be a compatibility issue with the default-jdk that installs with Ubuntu 18.04.

Also, once zcm-spy --zcm-url ipc starts, I see this error

Exception in thread "main" java.lang.UnsatisfiedLinkError: no zcmjni in java.library.path: [/usr/java/packages/lib, /usr/lib/x86_64-linux-gnu/jni, /lib/x86_64-linux-gnu, /usr/lib/x86_64-linux-gnu, /usr/lib/jni, /lib, /usr/lib]
        at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2654)
        at java.base/java.lang.Runtime.loadLibrary0(Runtime.java:876)
        at java.base/java.lang.System.loadLibrary(System.java:1875)
        at zcm.zcm.ZCMJNI.<clinit>(ZCMJNI.java:7)
        at zcm.zcm.ZCM.<init>(ZCM.java:37)
        at zcm.spy.Spy.<init>(Spy.java:77)
        at zcm.spy.Spy.main(Spy.java:481)

I'm not too sure how to compile with/for JNI. I also don't see the 1Hz publish message of the example from the tutorial in zcm-spy.

Here's the Java version for a little more context:

openjdk version "10.0.1" 2018-04-17
OpenJDK Runtime Environment (build 10.0.1+10-Ubuntu-3ubuntu1)
OpenJDK 64-Bit Server VM (build 10.0.1+10-Ubuntu-3ubuntu1, mixed mode)
jbendes commented 6 years ago

A quick Google shows that the incgc option is deprecated in Java version 10. Not sure what the replacement is, but it should work fine without it. As for your jni issues. Can you provide the exact steps you did to build and install zcm and then run spy?

jbendes commented 6 years ago

And can you paste the output of your build commands at each step?

sudhanvas commented 6 years ago

./waf configure --use-all had the following output:

 ---> Running in fe464d75bea2
Setting top to                           : /usr/local/src/zcm
Setting out to                           : /usr/local/src/zcm/build
Checking for 'gcc' (C compiler)          : /usr/bin/gcc
Checking for 'g++' (C++ compiler)        : /usr/bin/g++
Checking for program 'javac'             : /usr/lib/jvm/default-java/bin/javac
Checking for program 'java'              : /usr/lib/jvm/default-java/bin/java
Checking for program 'jar'               : /usr/lib/jvm/default-java/bin/jar
Checking for program 'javadoc'           : /usr/lib/jvm/default-java/bin/javadoc
Checking for header jni.h                : yes
Checking for program 'node'              : /usr/bin/node
Checking for program 'npm'               : /usr/bin/npm
Checking for program 'python'            : /usr/bin/python
Checking for python version              : 2.7.15
python-config                            : /usr/bin/python-config
Asking python-config for pyembed '--cflags --libs --ldflags' flags : yes
Testing pyembed configuration                                      : yes
Asking python-config for pyext '--cflags --libs --ldflags' flags   : yes
Testing pyext configuration                                        : yes
Checking for program 'cython'                                      : /usr/local/bin/cython
Checking for program 'pkg-config'                                  : /usr/bin/pkg-config
Checking for 'libzmq'                                              : yes
ZCM Version: 1.0.0

Dependency Configuration:
    C/C++                Enabled
    Java                 Enabled
    NodeJs               Enabled
    Python               Enabled
    ZeroMQ               Enabled
    Elf                  Enabled
    Third Party          Disabled

Transport Configuration:
    ipc                  Enabled
    inproc               Enabled
    udpm                 Enabled
    serial               Enabled

Type Configuration:
    hash-typename        Enabled
    hash-member-names    Disabled

Dev Configuration:
    Clang                Disabled
    CxxTest              Disabled

'configure' finished successfully (0.620s)

./waf build had the following output:

[ 1/77] Compiling zcm/blocking.cpp                                                                                                                                                                                 
[ 2/77] Compiling zcm/eventlog.c                                                                                                                                                                                   
[ 3/77] Compiling zcm/json/jsoncpp.cpp
[ 4/77] Compiling zcm/nonblocking.c
[ 5/77] Compiling zcm/tools/IndexerPlugin.cpp
[ 6/77] Compiling zcm/transport/generic_serial_transport.c
[ 7/77] Compiling zcm/transport/transport_file.cpp
[ 8/77] Compiling zcm/transport/transport_inproc.cpp
[ 9/77] Compiling zcm/transport/transport_serial.cpp
[10/77] Compiling zcm/transport/transport_zmq_local.cpp
[11/77] Compiling zcm/transport/udpm/buffers.cpp
[12/77] Compiling zcm/transport/udpm/mempool.cpp
[13/77] Compiling zcm/transport/udpm/udpm.cpp
[14/77] Compiling zcm/transport/udpm/udpmsocket.cpp
[15/77] Compiling zcm/transport_registrar.c
[16/77] Compiling zcm/url.cpp
[17/77] Compiling zcm/util/debug.cpp
[18/77] Compiling zcm/util/lockfile.cpp
[19/77] Compiling zcm/zcm.c
[20/77] Compiling zcm/java/jni/zcm_zcm_ZCMJNI.c
[21/77] Processing javac: zcm/java/zcm/zcm/MessageAggregator.java zcm/java/zcm/zcm/Provider.java zcm/java/zcm/zcm/URLParser.java zcm/java/zcm/zcm/ZCM.java zcm/java/zcm/zcm/ZCMDataInputStream.java zcm/java/zcm/zc
m/ZCMDataOutputStream.java zcm/java/zcm/zcm/ZCMEncodable.java zcm/java/zcm/zcm/ZCMJNI.java zcm/java/zcm/zcm/ZCMSubscriber.java
[22/77] Processing zerocm-1.0.0.tgz: zcm/js/node/README.md zcm/js/node/index.js zcm/js/node/package.json -> build/zcm/js/zerocm-1.0.0.tgz
[23/77] Compiling zcm/js/client/zcm-client.js
[24/77] Compiling zcm/python/zcm.pyx
[25/77] Compiling config/zcm.pc.in
[26/77] Compiling config/zcm-tools.pc.in
[27/77] Compiling gen/GetOpt.cpp
[28/77] Compiling gen/Main.cpp
[29/77] Compiling gen/ZCMGen.cpp
[30/77] Compiling gen/emit/EmitC.cpp
[31/77] Compiling gen/emit/EmitCpp.cpp
[32/77] Compiling gen/emit/EmitJava.cpp
[33/77] Compiling gen/emit/EmitNode.cpp
[34/77] Compiling gen/emit/EmitPython.cpp
[35/77] Compiling gen/emit/Emitter.cpp
[36/77] Compiling gen/tokenize.c
[37/77] Compiling tools/cpp/util/SymtabElf.cpp
[38/77] Compiling tools/cpp/util/TranscoderPluginDb.cpp
[39/77] Compiling tools/cpp/util/TypeDb.cpp
[40/77] Compiling tools/cpp/logplayer/main.cpp
[41/77] Compiling tools/cpp/repeater/main.cpp
[42/77] Compiling tools/cpp/spy-peek/main.cpp
[43/77] Compiling tools/cpp/spy-lite/Debug.cpp
[44/77] Compiling tools/cpp/spy-lite/MsgDisplay.cpp
[45/77] Compiling tools/cpp/spy-lite/MsgInfo.cpp
[46/77] Compiling tools/cpp/spy-lite/main.cpp
[47/77] Compiling tools/cpp/indexer/IndexerPluginDb.cpp
[48/77] Compiling tools/cpp/indexer/main.cpp
[49/77] Compiling tools/cpp/transcoder/main.cpp
[50/77] Compiling tools/cpp/logger/main.cpp
[51/77] Compiling tools/cpp/bridge/main.cpp
[52/77] Compiling tools/java/zcm-spy.in
[53/77] Compiling tools/java/zcm-logplayer-gui.in
[54/77] Compiling tools/java/zcm-csv-writer.in
[55/77] Compiling tools/java/zcm-csv-reader.in
[56/77] Compiling tools/java/zcm-log-transcoder-java.in
[57/77] Creating build/zcm.gitid
[58/77] Compiling build/zcm/python/zcm.c
[59/77] Processing jar_create: build/zcm/java/classes/zcm/zcm/MessageAggregator$Message.class build/zcm/java/classes/zcm/zcm/MessageAggregator.class build/zcm/java/classes/zcm/zcm/Provider.class build/zcm/java/c
lasses/zcm/zcm/URLParser.class build/zcm/java/classes/zcm/zcm/ZCM$SimpleSubscriber.class build/zcm/java/classes/zcm/zcm/ZCM$SubscriptionRecord.class build/zcm/java/classes/zcm/zcm/ZCM.class build/zcm/java/classe
s/zcm/zcm/ZCMDataInputStream.class build/zcm/java/classes/zcm/zcm/ZCMDataOutputStream.class build/zcm/java/classes/zcm/zcm/ZCMEncodable.class build/zcm/java/classes/zcm/zcm/ZCMJNI.class build/zcm/java/classes/zc
m/zcm/ZCMSubscriber.class -> build/zcm/java/zcm.jar
[60/77] Linking build/zcm/libzcm.so
[61/77] Linking build/tools/cpp/util/libzcm_tools_util.a
[62/77] Linking build/gen/zcm-gen
[63/77] Processing embed-tar: zcm/nonblocking.c zcm/nonblocking.h zcm/transport/generic_serial_transport.c zcm/transport/generic_serial_transport.h zcm/transport.h zcm/zcm-cpp-impl.hpp zcm/zcm-cpp.hpp zcm/zcm.c
zcm/zcm.h zcm/zcm_coretypes.h zcm/zcm_private.h build/zcm.gitid -> build/zcm/.zcm-embed-tmp.tar.gz
tar: Removing leading `../' from member names

[64/77] Linking build/tools/cpp/logplayer/zcm-logplayer
[65/77] Linking build/zcm/java/libzcmjni.so
[66/77] Linking build/tools/cpp/spy-lite/zcm-spy-lite
[67/77] Linking build/tools/cpp/transcoder/zcm-log-transcoder
[68/77] Linking build/tools/cpp/spy-peek/zcm-spy-peek
[69/77] Compiling build/zcm/.zcm-embed-tmp.tar.gz
[70/77] Processing javac: tools/java/zcm/logging/CsvReader.java tools/java/zcm/logging/CsvReaderPlugin.java tools/java/zcm/logging/CsvWriter.java tools/java/zcm/logging/CsvWriterPlugin.java tools/java/zcm/loggin
g/JScrubber.java tools/java/zcm/logging/JScrubberListener.java tools/java/zcm/logging/Log.java tools/java/zcm/logging/LogDiagnostic.java tools/java/zcm/logging/LogPlayer.java tools/java/zcm/logging/Logger.java t
ools/java/zcm/logging/Transcoder.java tools/java/zcm/logging/TranscoderPlugin.java tools/java/zcm/spy/ChannelData.java tools/java/zcm/spy/ObjectPanel.java tools/java/zcm/spy/Spy.java tools/java/zcm/spy/SpyPlugin
.java tools/java/zcm/util/BufferedRandomAccessFile.java tools/java/zcm/util/ClassDiscoverer.java tools/java/zcm/util/ColorMapper.java tools/java/zcm/util/JImage.java tools/java/zcm/util/ParameterGUI.java tools/j
ava/zcm/util/ParameterListener.java tools/java/zcm/util/TableSorter.java tools/java/zcm/util/ZCMTypeDatabase.java
[71/77] Compiling build/zcm/zcm-embed.tar.gz
[72/77] Linking build/tools/cpp/indexer/zcm-log-indexer
[73/77] Linking build/tools/cpp/bridge/zcm-bridge
[74/77] Linking build/zcm/python/zcm.so
[75/77] Linking build/tools/cpp/repeater/zcm-repeater
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

[76/77] Processing jar_create: build/tools/java/classes/zcm/logging/CsvReader$1.class build/tools/java/classes/zcm/logging/CsvReader$PluginClassVisitor.class build/tools/java/classes/zcm/logging/CsvReader.class
build/tools/java/classes/zcm/logging/CsvReaderPlugin.class build/tools/java/classes/zcm/logging/CsvWriter$1.class build/tools/java/classes/zcm/logging/CsvWriter$PluginClassVisitor.class build/tools/java/classes/
zcm/logging/CsvWriter.class build/tools/java/classes/zcm/logging/CsvWriterPlugin.class build/tools/java/classes/zcm/logging/JScrubber$Bookmark.class build/tools/java/classes/zcm/logging/JScrubber$ExportAction.cl
ass build/tools/java/classes/zcm/logging/JScrubber$MyMouseAdapter.class build/tools/java/classes/zcm/logging/JScrubber$PopupAction.class build/tools/java/classes/zcm/logging/JScrubber$ZoomAction.class build/tool
s/java/classes/zcm/logging/JScrubber.class build/tools/java/classes/zcm/logging/JScrubberListener.class build/tools/java/classes/zcm/logging/Log$Event.class build/tools/java/classes/zcm/logging/Log.class build/t
ools/java/classes/zcm/logging/LogDiagnostic.class build/tools/java/classes/zcm/logging/LogPlayer$1.class build/tools/java/classes/zcm/logging/LogPlayer$2.class build/tools/java/classes/zcm/logging/LogPlayer$3.cl
ass build/tools/java/classes/zcm/logging/LogPlayer$4.class build/tools/java/classes/zcm/logging/LogPlayer$5.class build/tools/java/classes/zcm/logging/LogPlayer$6.class build/tools/java/classes/zcm/logging/LogPl
ayer$7.class build/tools/java/classes/zcm/logging/LogPlayer$8.class build/tools/java/classes/zcm/logging/LogPlayer$Filter.class build/tools/java/classes/zcm/logging/LogPlayer$FilterTableModel.class build/tools/j
ava/classes/zcm/logging/LogPlayer$MyScrubberListener.class build/tools/java/classes/zcm/logging/LogPlayer$PlayPauseEvent.class build/tools/java/classes/zcm/logging/LogPlayer$PlayerThread.class build/tools/java/c
lasses/zcm/logging/LogPlayer$QueueThread.class build/tools/java/classes/zcm/logging/LogPlayer$QueuedEvent.class build/tools/java/classes/zcm/logging/LogPlayer$SeekEvent.class build/tools/java/classes/zcm/logging
/LogPlayer$StepEvent.class build/tools/java/classes/zcm/logging/LogPlayer$UDPThread.class build/tools/java/classes/zcm/logging/LogPlayer.class build/tools/java/classes/zcm/logging/Logger.class build/tools/java/c
lasses/zcm/logging/Transcoder$1.class build/tools/java/classes/zcm/logging/Transcoder$PluginClassVisitor.class build/tools/java/classes/zcm/logging/Transcoder.class build/tools/java/classes/zcm/logging/Transcode
rPlugin.class build/tools/java/classes/zcm/spy/ChannelData.class build/tools/java/classes/zcm/spy/ObjectPanel$MyMouseAdapter.class build/tools/java/classes/zcm/spy/ObjectPanel$PaintState.class build/tools/java/c
lasses/zcm/spy/ObjectPanel$Section.class build/tools/java/classes/zcm/spy/ObjectPanel.class build/tools/java/classes/zcm/spy/Spy$1.class build/tools/java/classes/zcm/spy/Spy$2.class build/tools/java/classes/zcm/
spy/Spy$3.class build/tools/java/classes/zcm/spy/Spy$ChannelTableModel.class build/tools/java/classes/zcm/spy/Spy$DefaultViewer.class build/tools/java/classes/zcm/spy/Spy$HzThread.class build/tools/java/classes/
zcm/spy/Spy$MySubscriber.class build/tools/java/classes/zcm/spy/Spy$PluginClassVisitor.class build/tools/java/classes/zcm/spy/Spy.class build/tools/java/classes/zcm/spy/SpyPlugin.class build/tools/java/classes/z
cm/util/BufferedRandomAccessFile.class build/tools/java/classes/zcm/util/ClassDiscoverer$1.class build/tools/java/classes/zcm/util/ClassDiscoverer$ClassVisitor.class build/tools/java/classes/zcm/util/ClassDiscov
erer.class build/tools/java/classes/zcm/util/ColorMapper.class build/tools/java/classes/zcm/util/JImage$1.class build/tools/java/classes/zcm/util/JImage$MyListener.class build/tools/java/classes/zcm/util/JImage$
ScaleAction.class build/tools/java/classes/zcm/util/JImage.class build/tools/java/classes/zcm/util/ParameterGUI$1.class build/tools/java/classes/zcm/util/ParameterGUI$ActionNotifier.class build/tools/java/classe
s/zcm/util/ParameterGUI$BooleanValue$1.class build/tools/java/classes/zcm/util/ParameterGUI$BooleanValue.class build/tools/java/classes/zcm/util/ParameterGUI$DoubleValue$1.class build/tools/java/classes/zcm/util
/ParameterGUI$DoubleValue$2.class build/tools/java/classes/zcm/util/ParameterGUI$DoubleValue.class build/tools/java/classes/zcm/util/ParameterGUI$IntegerValue$1.class build/tools/java/classes/zcm/util/ParameterG
UI$IntegerValue$2.class build/tools/java/classes/zcm/util/ParameterGUI$IntegerValue.class build/tools/java/classes/zcm/util/ParameterGUI$JTFListener.class build/tools/java/classes/zcm/util/ParameterGUI$PValue.cl
ass build/tools/java/classes/zcm/util/ParameterGUI$StringValue$1.class build/tools/java/classes/zcm/util/ParameterGUI$StringValue$2.class build/tools/java/classes/zcm/util/ParameterGUI$StringValue.class build/to
ols/java/classes/zcm/util/ParameterGUI.class build/tools/java/classes/zcm/util/ParameterListener.class build/tools/java/classes/zcm/util/TableSorter$1.class build/tools/java/classes/zcm/util/TableSorter$2.class
build/tools/java/classes/zcm/util/TableSorter$Arrow.class build/tools/java/classes/zcm/util/TableSorter$Directive.class build/tools/java/classes/zcm/util/TableSorter$MouseHandler.class build/tools/java/classes/z
cm/util/TableSorter$Row.class build/tools/java/classes/zcm/util/TableSorter$SortableHeaderRenderer.class build/tools/java/classes/zcm/util/TableSorter$TableModelHandler.class build/tools/java/classes/zcm/util/Ta
bleSorter.class build/tools/java/classes/zcm/util/ZCMTypeDatabase$MyClassVisitor.class build/tools/java/classes/zcm/util/ZCMTypeDatabase.class -> build/tools/java/zcm-tools.jar
[77/77] Linking build/tools/cpp/logger/zcm-logger
Waf: Leaving directory `/usr/local/src/zcm/build'
'build' finished successfully (12.716s)

Finally, sudo ./waf install had the following output:

Waf: Entering directory `/usr/local/src/zcm/build'
+ install /usr/local/share/scripts/install-zcm-deps.sh (from scripts/install-deps.sh)
+ install /usr/local/lib/libzcm.so (from build/zcm/libzcm.so)
+ install /usr/local/include/zcm/util/Filter.hpp (from zcm/util/Filter.hpp)
+ install /usr/local/include/zcm/tools/IndexerPlugin.hpp (from zcm/tools/IndexerPlugin.hpp)
+ install /usr/local/include/zcm/zcm.h (from zcm/zcm.h)
+ install /usr/local/include/zcm/json/json.h (from zcm/json/json.h)
+ install /usr/local/include/zcm/transport/generic_serial_transport.h (from zcm/transport/generic_serial_transport.h)
+ install /usr/local/include/zcm/tools/TranscoderPlugin.hpp (from zcm/tools/TranscoderPlugin.hpp)
+ install /usr/local/lib/libzcmjni.so (from build/zcm/java/libzcmjni.so)
+ install /usr/local/include/zcm/zcm_coretypes.h (from zcm/zcm_coretypes.h)
+ install /usr/local/include/zcm/json/json-forwards.h (from zcm/json/json-forwards.h)
+ install /usr/local/include/zcm/transport.h (from zcm/transport.h)
+ install /usr/local/include/zcm/transport_registrar.h (from zcm/transport_registrar.h)
+ install /usr/local/include/zcm/url.h (from zcm/url.h)
+ install /usr/local/include/zcm/eventlog.h (from zcm/eventlog.h)
+ install /usr/local/include/zcm/zcm-cpp.hpp (from zcm/zcm-cpp.hpp)
+ install /usr/local/include/zcm/zcm-cpp-impl.hpp (from zcm/zcm-cpp-impl.hpp)
+ install /usr/local/include/zcm/transport_register.hpp (from zcm/transport_register.hpp)
+ install /usr/local/share/java/zcm.jar (from build/zcm/java/zcm.jar)
+ install /usr/local/include/zcm/message_tracker.hpp (from zcm/message_tracker.hpp)
+ install /usr/local/share/node/zcm-client.js (from build/zcm/js/zcm-client.js)
+ install /usr/local/share/node/zerocm-1.0.0.tgz (from build/zcm/js/zerocm-1.0.0.tgz)
+ install /usr/local/lib/python2.7/dist-packages/zcm.so (from build/zcm/python/zcm.so)
+ install /usr/local/lib/pkgconfig/zcm.pc (from build/config/zcm.pc)
+ install /usr/local/lib/pkgconfig/zcm-tools.pc (from build/config/zcm-tools.pc)
+ install /usr/local/bin/zcm-gen (from build/gen/zcm-gen)
+ install /usr/local/share/waf/zcm-gen.py (from examples/waftools/zcm-gen.py)
+ install /usr/local/bin/zcm-logplayer (from build/tools/cpp/logplayer/zcm-logplayer)
+ install /usr/local/bin/zcm-repeater (from build/tools/cpp/repeater/zcm-repeater)
+ install /usr/local/bin/zcm-spy-peek (from build/tools/cpp/spy-peek/zcm-spy-peek)
+ install /usr/local/bin/zcm-spy-lite (from build/tools/cpp/spy-lite/zcm-spy-lite)
+ install /usr/local/bin/zcm-log-indexer (from build/tools/cpp/indexer/zcm-log-indexer)
+ install /usr/local/bin/zcm-log-transcoder (from build/tools/cpp/transcoder/zcm-log-transcoder)
+ install /usr/local/bin/zcm-logger (from build/tools/cpp/logger/zcm-logger)
+ install /usr/local/bin/zcm-bridge (from build/tools/cpp/bridge/zcm-bridge)
+ install /usr/local/share/java/zcm-tools.jar (from build/tools/java/zcm-tools.jar)
+ install /usr/local/bin/zcm-spy (from build/tools/java/zcm-spy)
+ install /usr/local/bin/zcm-logplayer-gui (from build/tools/java/zcm-logplayer-gui)
+ install /usr/local/bin/zcm-csv-writer (from build/tools/java/zcm-csv-writer)
+ install /usr/local/bin/zcm-csv-reader (from build/tools/java/zcm-csv-reader)
[103/107] Creating build/zcm.gitid
+ install /usr/local/bin/zcm-log-transcoder-java (from build/tools/java/zcm-log-transcoder-java)
+ install /usr/local/lib/zcm.gitid (from build/zcm.gitid)
Waf: Leaving directory `/usr/local/src/zcm/build'
'install' finished successfully (0.087s)

I actually just ran the following to being zcm-spy up:

jars=/usr/local/share/java/zcm-tools.jar:/usr/local/share/java/zcm.jar
java -server -Xmx128m -Xms64m -ea -cp $jars zcm.spy.Spy --zcm-url ipc

I've also tried running zcm-spy --zcm-url ipc.

sudhanvas commented 6 years ago

FWIW, I see the same issue with JNI in Ubuntu 16.04 with the following Java version:

openjdk version "1.8.0_171"
OpenJDK Runtime Environment (build 1.8.0_171-8u171-b11-0ubuntu0.16.04.1-b11)
OpenJDK 64-Bit Server VM (build 25.171-b11, mixed mode)

This is the actual error:

Exception in thread "main" java.lang.UnsatisfiedLinkError: no zcmjni in java.library.path
        at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1867)
        at java.lang.Runtime.loadLibrary0(Runtime.java:870)
        at java.lang.System.loadLibrary(System.java:1122)
        at zcm.zcm.ZCMJNI.<clinit>(ZCMJNI.java:7)
        at zcm.zcm.ZCM.<init>(ZCM.java:37)
        at zcm.spy.Spy.<init>(Spy.java:77)
        at zcm.spy.Spy.main(Spy.java:481)
jbendes commented 6 years ago

So the short of it is that java can't find libzcmjni.so. Can you paste your $LD_LIBRARY_PATH here as well? I would guess it does not include /usr/local/lib

jbendes commented 6 years ago

I just updated the FAQs section to reflect this question: http://zerocm.github.io/zcm/docs/FAQs.html Let me know if that helps

sudhanvas commented 6 years ago

Yes, that helped, thanks!