Export shapefile throw java.lang.NoClassDefFoundError: org/apache/log4j/Logger

[jpopol]

Hi I have integrated a point graph in neo4j but when I want to export those point as a shapefile I receive the following exception and the generated file is empty of data content.

Is it something you guys already experienced ?

Nov 20, 2015 3:04:45 PM org.geotools.data.shapefile.ShapefileDataStore createSchema WARNING: PRJ file not generated for null CoordinateReferenceSystem getFeatureSource(SeaGraph) - locking manager is present getFeatureReader(SeaGraph,class org.opengis.filter.IncludeFilter Filter.INCLUDE) java.lang.NoClassDefFoundError: org/apache/log4j/Logger at org.geotools.data.neo4j.Neo4jSpatialFeatureReader.(Neo4jSpatialFeatureReader.java:43) at org.geotools.data.neo4j.Neo4jSpatialDataStore.getFeatureReader(Neo4jSpatialDataStore.java:335) at org.geotools.data.neo4j.Neo4jSpatialDataStore.getFeatureReader(Neo4jSpatialDataStore.java:305) at org.geotools.data.AbstractDataStore.getFeatureReader(AbstractDataStore.java:369) at org.geotools.data.DefaultFeatureResults.reader(DefaultFeatureResults.java:215) at org.geotools.data.store.DataFeatureCollection.openIterator(DataFeatureCollection.java:231) at org.geotools.data.store.DataFeatureCollection.iterator(DataFeatureCollection.java:199) at org.geotools.data.store.DataFeatureCollection.features(DataFeatureCollection.java:188) at org.geotools.data.store.DataFeatureCollection.features(DataFeatureCollection.java:79) at org.geotools.data.store.ContentFeatureStore.addFeatures(ContentFeatureStore.java:243) at org.neo4j.gis.spatial.ShapefileExporter.exportLayer(ShapefileExporter.java:91) at org.neo4j.gis.spatial.ShapefileExporter.exportLayer(ShapefileExporter.java:57)

[craigtaverner]

Is it possible for you to provide some code that causes this problem?

Looking at the error I see two things that might be relevant. One is that you have not specified a coordinate reference system, the other is that you have not configured log4j. It is not for certain that either of these are the reason the file is empty, but they could be relevant.

Best that you create a failing test case for us to review On Nov 20, 2015 5:01 PM, "jpopol" [email protected] wrote:

Hi I have integrated a point graph in neo4j but when I want to export those point as a shapefile I receive the following exception and the generated file is empty of data content.

Is it something you guys already experienced ?

Nov 20, 2015 3:04:45 PM org.geotools.data.shapefile.ShapefileDataStore createSchema WARNING: PRJ file not generated for null CoordinateReferenceSystem getFeatureSource(SeaGraph) - locking manager is present getFeatureReader(SeaGraph,class org.opengis.filter.IncludeFilter Filter.INCLUDE) java.lang.NoClassDefFoundError: org/apache/log4j/Logger at org.geotools.data.neo4j.Neo4jSpatialFeatureReader.(Neo4jSpatialFeatureReader.java:43) at org.geotools.data.neo4j.Neo4jSpatialDataStore.getFeatureReader(Neo4jSpatialDataStore.java:335) at org.geotools.data.neo4j.Neo4jSpatialDataStore.getFeatureReader(Neo4jSpatialDataStore.java:305) at org.geotools.data.AbstractDataStore.getFeatureReader(AbstractDataStore.java:369) at org.geotools.data.DefaultFeatureResults.reader(DefaultFeatureResults.java:215) at org.geotools.data.store.DataFeatureCollection.openIterator(DataFeatureCollection.java:231) at org.geotools.data.store.DataFeatureCollection.iterator(DataFeatureCollection.java:199) at org.geotools.data.store.DataFeatureCollection.features(DataFeatureCollection.java:188) at org.geotools.data.store.DataFeatureCollection.features(DataFeatureCollection.java:79) at org.geotools.data.store.ContentFeatureStore.addFeatures(ContentFeatureStore.java:243) at org.neo4j.gis.spatial.ShapefileExporter.exportLayer(ShapefileExporter.java:91) at org.neo4j.gis.spatial.ShapefileExporter.exportLayer(ShapefileExporter.java:57)

— Reply to this email directly or view it on GitHub https://github.com/neo4j-contrib/spatial/issues/210.

[jpopol]

I don't have the code right now with me but I'm pretty sure that I don't specify the coordinate reference system. I'll give a sample of the code tomorrow

2015-11-22 11:47 GMT+00:00 Craig Taverner [email protected]:

Is it possible for you to provide some code that causes this problem?

Looking at the error I see two things that might be relevant. One is that you have not specified a coordinate reference system, the other is that you have not configured log4j. It is not for certain that either of these are the reason the file is empty, but they could be relevant.

Best that you create a failing test case for us to review On Nov 20, 2015 5:01 PM, "jpopol" [email protected] wrote:

Hi I have integrated a point graph in neo4j but when I want to export those point as a shapefile I receive the following exception and the generated file is empty of data content.

Is it something you guys already experienced ?

Nov 20, 2015 3:04:45 PM org.geotools.data.shapefile.ShapefileDataStore createSchema WARNING: PRJ file not generated for null CoordinateReferenceSystem getFeatureSource(SeaGraph) - locking manager is present getFeatureReader(SeaGraph,class org.opengis.filter.IncludeFilter Filter.INCLUDE) java.lang.NoClassDefFoundError: org/apache/log4j/Logger at

org.geotools.data.neo4j.Neo4jSpatialFeatureReader.(Neo4jSpatialFeatureReader.java:43) at

org.geotools.data.neo4j.Neo4jSpatialDataStore.getFeatureReader(Neo4jSpatialDataStore.java:335) at

org.geotools.data.neo4j.Neo4jSpatialDataStore.getFeatureReader(Neo4jSpatialDataStore.java:305) at

org.geotools.data.AbstractDataStore.getFeatureReader(AbstractDataStore.java:369) at

org.geotools.data.DefaultFeatureResults.reader(DefaultFeatureResults.java:215) at

org.geotools.data.store.DataFeatureCollection.openIterator(DataFeatureCollection.java:231) at

org.geotools.data.store.DataFeatureCollection.iterator(DataFeatureCollection.java:199) at

org.geotools.data.store.DataFeatureCollection.features(DataFeatureCollection.java:188) at

org.geotools.data.store.DataFeatureCollection.features(DataFeatureCollection.java:79) at

org.geotools.data.store.ContentFeatureStore.addFeatures(ContentFeatureStore.java:243) at

org.neo4j.gis.spatial.ShapefileExporter.exportLayer(ShapefileExporter.java:91) at

org.neo4j.gis.spatial.ShapefileExporter.exportLayer(ShapefileExporter.java:57)

— Reply to this email directly or view it on GitHub https://github.com/neo4j-contrib/spatial/issues/210.

— Reply to this email directly or view it on GitHub https://github.com/neo4j-contrib/spatial/issues/210#issuecomment-158752266 .

[jpopol]

code sample I hope you don't mind scala, if there is any doubt about meanings let me know

val tx = db.beginTx()
val spatialService = new SpatialDatabaseService(db)
val layer = spatialService.getOrCreateLayer("SeaGraph", classOf[WKBGeometryEncoder], classOf[EditableLayerImpl]).asInstanceOf[EditableLayer]
val geometryFactory = layer.getGeometryFactory

// Then for each node we have in another graph representation
val point = geometryFactory.createPoint(new Coordinate(nodeFromOtherLib.getAttribute[Double]("x"), nodeFromOtherLib.getAttribute[Double]("y")))

val geoNode = layer.add(point)
val neoNode = geoNode.getGeomNode

neoNode.addLabel(locationLabel)
neoNode.setProperty("name", nodeFromOtherLib.getId)

tx.success()
tx.close()

finally:

//db is GraphDatabaseService 
// layer is "SeaGraph"
 new ShapefileExporter(db).exportLayer(layer, file) //<- this is the code that fail for me

[jpopol]

Okay so I made an other test where I integrate the CRS

//...
val layer = spatialService.getOrCreateLayer("SeaGraph", classOf[WKBGeometryEncoder], classOf[EditableLayerImpl]).asInstanceOf[EditableLayer]
layer.setCoordinateReferenceSystem(DefaultGeographicCRS.WGS84)
//...

and I still end up with this problem meaning that this issue lean toward log4j config I guess

[jpopol]

Okay I think I fount it I had to add this dependency in my build:

"org.apache.logging.log4j" % "log4j-api" % "2.3"

[ehx-v1]

if this is solved, why is it still open then?

[jpopol]

Well I proposed a workaround which is basically bringing some necessary dependencies that are not shipped out of the box. But I believe the real issue (missing dependencies) is still present right ?

[ehx-v1]

that should be in the Apache Commons if I'm not mistaken, which should be pulled by Neo4j, perhaps you should check your Maven

[ehx-v1]

now I have similar issues with org.apache.commons.collections.MapUtils obviously Apache has done some Commons restructuring without any notice @craigtaverner please update the dependencies, and you should request Apache to have a proper notificational changelog

[ehx-v1]

after adding the dependency it still doesn't work because the package is (...).collections4.MapUtils instead of collections

[ehx-v1]

ok with lots of help from Google ;-) I found this dependency, which keeps fitting: https://1maven.com/findpomandjar/org.glassfish.external:apache-commons:3.0-b68

[ehx-v1]

that's what you should pull

[ehx-v1]

in this dependency there's also such thing as logging/Log, which you perhaps could consider switching to