Using janusgraph-0.1.0-hadoop2 with backend cassandra-3.0.14:

This is the configuration file:

storage.backend=cassandrathrift

storage.hostname=hostName1

storage.cassandra.keyspace=keyspaceName

storage.batch-loading=false

cache.db-cache=true

cache.db-cache-time = 180000

cache.db-cache-size = 0.25

storage.lock.wait-time=300000

storage.lock.retries=10

storage.lock.clean-expired=true

storage.buffer-size=512

ids.block-size=300000

storage.cassandra.compression=false

storage.lock.expiry-time=100

index.search.backend=elasticsearch

index.search.hostname=es-hostName

index.search.elasticsearch.client-only=true

storage.connection-timeout=300000

Tried to create a new label with new cassandra keyspace(empty keyspace)..but getting below exception:

graph = JanusGraphFactory.open('janus.properties')

mgmt= graph.openManagement()

labelName = mgmt.makeVertexLabel('labelName').make()

mgmt.commit()

Could not commit transaction due to exception during persistence

Type ':help' or ':h' for help.

Display stack trace? [yN]y

org.janusgraph.core.JanusGraphException: Could not commit transaction due to exception during persistence

at org.janusgraph.graphdb.transaction.StandardJanusGraphTx.commit(StandardJanusGraphTx.java:1374)

at org.janusgraph.graphdb.database.management.ManagementSystem.commit(ManagementSystem.java:235)

at org.janusgraph.core.schema.JanusGraphManagement$commit.call(Unknown Source)

at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)

at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)

at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:117)

at groovysh_evaluate.run(groovysh_evaluate:3)

at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:232)

at org.codehaus.groovy.tools.shell.Interpreter.evaluate(Interpreter.groovy:70)

at org.codehaus.groovy.tools.shell.Groovysh.execute(Groovysh.groovy:190)

at org.apache.tinkerpop.gremlin.console.GremlinGroovysh.super$3$execute(GremlinGroovysh.groovy)

at sun.reflect.GeneratedMethodAccessor14.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)

at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)

at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1215)

at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:132)

at org.apache.tinkerpop.gremlin.console.GremlinGroovysh.execute(GremlinGroovysh.groovy:72)

at org.codehaus.groovy.tools.shell.Shell.leftShift(Shell.groovy:122)

at org.codehaus.groovy.tools.shell.ShellRunner.work(ShellRunner.groovy:95)

at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$2$work(InteractiveShellRunner.groovy)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)

at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)

at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1215)

at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:132)

at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:152)

at org.codehaus.groovy.tools.shell.InteractiveShellRunner.work(InteractiveShellRunner.groovy:124)

at org.codehaus.groovy.tools.shell.ShellRunner.run(ShellRunner.groovy:59)

at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$2$run(InteractiveShellRunner.groovy)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)

at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)

at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1215)

at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:132)

at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:152)

at org.codehaus.groovy.tools.shell.InteractiveShellRunner.run(InteractiveShellRunner.groovy:83)

at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:232)

at org.apache.tinkerpop.gremlin.console.Console.<init>(Console.groovy:152)

at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:232)

at org.apache.tinkerpop.gremlin.console.Console.main(Console.groovy:455)

Caused by: org.janusgraph.core.JanusGraphException: Could not execute operation due to backend exception

at org.janusgraph.diskstorage.util.BackendOperation.execute(BackendOperation.java:57)

at org.janusgraph.diskstorage.keycolumnvalue.cache.CacheTransaction.persist(CacheTransaction.java:95)

at org.janusgraph.diskstorage.keycolumnvalue.cache.CacheTransaction.flushInternal(CacheTransaction.java:143)

at org.janusgraph.diskstorage.keycolumnvalue.cache.CacheTransaction.commit(CacheTransaction.java:200)

at org.janusgraph.diskstorage.BackendTransaction.commit(BackendTransaction.java:150)

at org.janusgraph.graphdb.database.StandardJanusGraph.commit(StandardJanusGraph.java:703)

at org.janusgraph.graphdb.transaction.StandardJanusGraphTx.commit(StandardJanusGraphTx.java:1363)

... 47 more

Caused by: org.janusgraph.diskstorage.TemporaryBackendException: Could not successfully complete backend operation due to repeated temporary exceptions after PT3M20S

at org.janusgraph.diskstorage.util.BackendOperation.executeDirect(BackendOperation.java:101)

at org.janusgraph.diskstorage.util.BackendOperation.execute(BackendOperation.java:55)

... 53 more

Caused by: org.janusgraph.diskstorage.locking.TemporaryLockingException: No lock columns found for KeyColumn [k=0x 16-165-160-118-108- 30-114-101-113-117-101-115-116- 95-106-111-226, c=0x  0]

at org.janusgraph.diskstorage.locking.consistentkey.ConsistentKeyLocker.checkSeniority(ConsistentKeyLocker.java:519)

at org.janusgraph.diskstorage.locking.consistentkey.ConsistentKeyLocker.checkSingleLock(ConsistentKeyLocker.java:454)

at org.janusgraph.diskstorage.locking.consistentkey.ConsistentKeyLocker.checkSingleLock(ConsistentKeyLocker.java:123)

at org.janusgraph.diskstorage.locking.AbstractLocker.checkLocks(AbstractLocker.java:351)

at org.janusgraph.diskstorage.locking.consistentkey.ExpectedValueCheckingTransaction.checkAllLocks(ExpectedValueCheckingTransaction.java:178)

at org.janusgraph.diskstorage.locking.consistentkey.ExpectedValueCheckingTransaction.prepareForMutations(ExpectedValueCheckingTransaction.java:157)

at org.janusgraph.diskstorage.locking.consistentkey.ExpectedValueCheckingStoreManager.mutateMany(ExpectedValueCheckingStoreManager.java:72)

at org.janusgraph.diskstorage.keycolumnvalue.cache.CacheTransaction$1.call(CacheTransaction.java:98)

at org.janusgraph.diskstorage.keycolumnvalue.cache.CacheTransaction$1.call(CacheTransaction.java:95)

at org.janusgraph.diskstorage.util.BackendOperation.executeDirect(BackendOperation.java:69)

...54 more

http://docs.janusgraph.org/latest/indexes.html#_label_constraint

When a composite index with label restriction is defined as unique, the uniqueness constraint only applies to properties on vertices or edges for the specified label.

Robert Dale

On Mon, Sep 11, 2017 at 9:32 AM, Ankur Goel <an...@...> wrote:

Unique index is globally.

~AnkurG

On Monday, September 11, 2017 at 4:45:01 PM UTC+5:30, ya...@... wrote:

As I understand labels are used for partitioning. Does the same apply for clustering?

I.E I create vertices and edges with custom properties. Assume I have a unique property called: 'nodeId'.

Now I have logical groups. each group has a UUID. I use this UUID as the vertex label.

Can I create 2 different vertices with the same nodeId if they are assigned different labels? Or is the unique index global to all labels?

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Hi Jerry 

Thanks for the reply. 

The Sample use case could be like . John wantsBike BikeA . Here the edge label could have a ttl of 3 days. if i am suppose to understand all the users whose wantsBike  TTL is about to expire in next 9 hours , How can i get it.

In the tescases of JanusGraphTest ,I was not able to find the cases for finding the remaining TTL for the edge/vertex . I think it provides the configured time. Please let me know if my understanding is not right.

Regards

Sankar S

On Saturday, September 16, 2017 at 12:39:16 AM UTC+5:30, Jerry He wrote:

What is the use case that you want to fetch individual TTLs. 

The TTLs are defined on VertexLable, EdgeLable and PropertyKey via the management API.  After that anytime you can retrieve the generic TTL for a particular type, which is the pre-set fixed number.

There are ways to get individual TTL. You can look at  the TTL test cases in JanusGraphTest.

Thanks,

Jerry

On Friday, September 15, 2017 at 6:21:39 AM UTC-7, Sankar Sangili wrote:

Hi All,

We are working on janusgraph-cassandra api, and have implemented TTL on vertex labels. But we want to fetch the value of TTL for each vertex, 

Below link gives reference to fetch TTL of individual records in Cassandra, and we want to implement this using janusgraph.

Cassandra Query

https://docs.datastax.com/en/cql/3.3/cql/cql_reference/cqlSelect.html

Cassandra Query :-

'SELECT TTL(race_name) 

FROM cycling.calendar 

WHERE race_id=200;

Output:

 ttl(race_name)

----------------

            276  

We want to implement above query of cassandra using janusgraph.

So, can you please give reference to some link, or give some clarity on how we can implement this using Janusgraph.

If `l1` is `p1` then yes, this will create an edge from every player p1 to every player p2. You're not filtering anything out so all players show up in both `V().hasLabel('player')`.  If you want to filter out `self` and `has existing 'sameTeam' edge, try this:

g.V().hasLabel('player').as('p1').V().hasLabel('player').where(neq('p1')).where(eq('p1')).by('teamName').not(outE('sameTeam')).addE('sameTeam').from('p1')

Robert Dale

On Mon, Sep 18, 2017 at 1:58 AM, Ankur Goel <ankur...@...> wrote:

Thnx Robert n Daniel,

Its working like charm. But it got stuck in other use case:

where i want to create relation based on team:

g.V().hasLabel('player').as('p1').V().hasLabel('player').where(eq('l1')).by('teamName').addE('sameTeam').from('p1')

in this i want to create edges between same teamName player.

Above gremlin query is working but creating all combination of edges. For example for a 3 node of player label  having same team name, its creating 9 edges, instead of 3 only. Double edges for between two vertex and one loop to same vertex.

~AnkurG

On Fri, Sep 15, 2017 at 7:54 PM, Daniel Kuppitz <me@...> wrote:

Oops, Gmail didn't notify me about your response, sorry for the double-post.

On Fri, Sep 15, 2017 at 6:57 AM, Robert Dale <rob...@...> wrote:

g.V().hasLabel('player').as('player').V().hasLabel('Country').where(eq('player')).by('name').by('POB').addE('Z').from('player')

Robert Dale

On Fri, Sep 15, 2017 at 9:44 AM, Ankur Goel <ankur...@...> wrote:

Thnx Robert,

i am looking for a query like create edges where they have common properties without explicitly defining properties values:

g.V().has('player','POB',${A}).as('a').V().has('Country','name',{B}).addE('Z').from('a').where(${A} = ${B})

~AnkurG

On Friday, September 15, 2017 at 3:02:46 PM UTC+5:30, Ankur Goel wrote:

Hi,

 In JanusGraph to create edges we have two steps process:

1. First identify the vertex
2. Then create edges between vertex

Linkage between both steps is through App only.

How ever in neo4j, we can create edges using one step:

MATCH (a:player), (b:Country) WHERE a.POB = "X" AND b.name = "Y" 

CREATE (a)-[r: Z]->(b) 

RETURN a,b

Can we achieve the same in JanusGraph using Janus or tinkerpoop.

~AnkurG

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Hi,

i am having embedded (ES + Cassandra) server on remote server, that i connecting through java code.

i am consistently getting following logs for schema creation commit:

2017-09-18 14:07:28,822 WARN  [main] org.janusgraph.diskstorage.locking.consistentkey.ConsistentKeyLocker: Lock write succeeded but took too long: duration PT0.146S exceeded limit PT0.1S

 2017-09-18 14:07:28,956 WARN  [main] org.janusgraph.diskstorage.locking.consistentkey.ConsistentKeyLocker: Lock write succeeded but took too long: duration PT0.134S exceeded limit PT0.1S

 2017-09-18 14:07:29,115 WARN  [main] org.janusgraph.diskstorage.locking.consistentkey.ConsistentKeyLocker: Lock write succeeded but took too long: duration PT0.159S exceeded limit PT0.1S

 2017-09-18 14:07:29,250 ERROR [main] org.janusgraph.graphdb.database.StandardJanusGraph: Could not commit transaction [1] due to exception

 org.janusgraph.diskstorage.locking.TemporaryLockingException: Temporary locking failure

at org.janusgraph.diskstorage.locking.AbstractLocker.writeLock(AbstractLocker.java:309)

at org.janusgraph.diskstorage.locking.consistentkey.ExpectedValueCheckingStore.acquireLock(ExpectedValueCheckingStore.java:103)

at org.janusgraph.diskstorage.keycolumnvalue.KCVSProxy.acquireLock(KCVSProxy.java:52)

at org.janusgraph.diskstorage.BackendTransaction.acquireIndexLock(BackendTransaction.java:255)

at org.janusgraph.graphdb.database.StandardJanusGraph.prepareCommit(StandardJanusGraph.java:565)

at org.janusgraph.graphdb.database.StandardJanusGraph.commit(StandardJanusGraph.java:694)

at org.janusgraph.graphdb.transaction.StandardJanusGraphTx.commit(StandardJanusGraphTx.java:1363)

at org.janusgraph.graphdb.database.management.ManagementSystem.commit(ManagementSystem.java:235)

at com.test.ankur.janusgraph.mains.JGMgmtService.createSchema(JGMgmtService.java:131)

at com.test.ankur.janusgraph.mains.JanusGraphMain.schemaCreation(JanusGraphMain.java:107)

at com.test.ankur.janusgraph.mains.JanusGraphMain.main(JanusGraphMain.java:136)

Caused by: org.janusgraph.diskstorage.TemporaryBackendException: Lock write retry count exceeded

at org.janusgraph.diskstorage.locking.consistentkey.ConsistentKeyLocker.writeSingleLock(ConsistentKeyLocker.java:339)

at org.janusgraph.diskstorage.locking.consistentkey.ConsistentKeyLocker.writeSingleLock(ConsistentKeyLocker.java:123)

at org.janusgraph.diskstorage.locking.AbstractLocker.writeLock(AbstractLocker.java:304)

... 10 common frames omitted

Although i have modified following properties seeing network overhead, still seeing Lock write succeeded but took too long: duration PT0.146S exceeded limit PT0.1S in logs.

storage.lock-wait-time=900000

storage.wait-time=5000

What i am missing.

~AnkurG

What is the use case that you want to fetch individual TTLs. 

The TTLs are defined on VertexLable, EdgeLable and PropertyKey via the management API.  After that anytime you can retrieve the generic TTL for a particular type, which is the pre-set fixed number.

There are ways to get individual TTL. You can look at  the TTL test cases in JanusGraphTest.

Thanks,

Jerry

On Friday, September 15, 2017 at 6:21:39 AM UTC-7, Sankar Sangili wrote:

Hi All,

We are working on janusgraph-cassandra api, and have implemented TTL on vertex labels. But we want to fetch the value of TTL for each vertex, 

Below link gives reference to fetch TTL of individual records in Cassandra, and we want to implement this using janusgraph.

Cassandra Query

https://docs.datastax.com/en/cql/3.3/cql/cql_reference/cqlSelect.html

Cassandra Query :-

'SELECT TTL(race_name) 

FROM cycling.calendar 

WHERE race_id=200;

Output:

 ttl(race_name)

----------------

            276  

We want to implement above query of cassandra using janusgraph.

So, can you please give reference to some link, or give some clarity on how we can implement this using Janusgraph.

need help to use the master branch for janusgraph-hbase-solr setup
I got code compiled. When I run the example in the core directory, hbase
connection is fine and the table been created. But I got the following solr
index error
.....
17:23:48.039 [main] DEBUG o.j.d.hbase.HBaseStoreManager - [HBaseConfig]
s3.bytes-per-checksum=512
17:23:48.039 [main] DEBUG o.j.d.hbase.HBaseStoreManager - [HBaseConfig]
hfile.index.block.max.size=131072
17:23:48.039 [main] DEBUG o.j.d.hbase.HBaseStoreManager - [HBaseConfig]
yarn.resourcemanager.webapp.https.address=${yarn.resourcemanager.hostname}:8090
17:23:48.039 [main] DEBUG o.j.d.hbase.HBaseStoreManager - [HBaseConfig]
hbase.regionserver.info.bindAddress=0.0.0.0
17:23:48.039 [main] DEBUG o.j.d.hbase.HBaseStoreManager - End of HBase
config key=value pairs
17:23:48.040 [main] INFO org.janusgraph.diskstorage.Backend - Configuring
index [search]
Exception in thread "main" java.lang.IllegalArgumentException: Could not
find implementation class: org.janusgraph.diskstorage.solr.SolrIndex
at
org.janusgraph.util.system.ConfigurationUtil.instantiate(ConfigurationUtil.java:61)
at
org.janusgraph.diskstorage.Backend.getImplementationClass(Backend.java:477)
at org.janusgraph.diskstorage.Backend.getIndexes(Backend.java:464)
at org.janusgraph.diskstorage.Backend.<init>(Backend.java:149)
at
org.janusgraph.graphdb.configuration.GraphDatabaseConfiguration.getBackend(GraphDatabaseConfiguration.java:1872)
at
org.janusgraph.graphdb.database.StandardJanusGraph.<init>(StandardJanusGraph.java:134)
at org.janusgraph.core.JanusGraphFactory.open(JanusGraphFactory.java:107)
at org.janusgraph.core.JanusGraphFactory.open(JanusGraphFactory.java:75)
at com.sysomos.labs.janusgraph.MyTestFactory.main(MyTestFactory.java:165)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Caused by: java.lang.ClassNotFoundException:
org.janusgraph.diskstorage.solr.SolrIndex
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at
org.janusgraph.util.system.ConfigurationUtil.instantiate(ConfigurationUtil.java:56)

My janusgraph-hbase-solr.properties like this


storage.backend=hbase

storage.hostname=alghzk01:2181,alghzk02:2181,alghzk03:2181


cache.db-cache = false


index.search.backend=solr (solr6.6 is used)

index.search.solr.mode=cloud

index.search.solr.zookeeper-url=alzk01.lab.dev.yyz.corp.pvt:2181/solr,alzk02.lab.dev.yyz.corp.pvt:2181/solr,alzk03.lab.dev.yyz.corp.pvt:2181/solr

index.search.solr.configset=janusGraphConf

#index.vertics.solr.num-shards=10

#index.edges.solr.num-shards=10


I do have solr collections (edges and vertices) created.


Thanks,

Guan



On Friday, 15 September 2017 08:53:34 UTC-7, Jason Plurad wrote:

JanusGraph 0.2.0 will be out before next year, definitely.
If you want to try out the ES 5.5 functionality, it is available now on
the master branch.
Build a distribution from source code, and you can help test it out now.


On Friday, September 15, 2017 at 10:42:08 AM UTC-4, Suny wrote:

I see JG 0.1.1 is compatible with 1.5.1 version of Elastic Search. I
read somewhere JG 0.2.0 is going to support ES 5.x, but it is going to be
released early next year may be. Is it possible to customize JG 0.1.1 it to
work with ES 5.5.1 version ? Is this a good idea ? Did anybody tried doing
this ?

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Hello,

I'm new to big data including JanusGraph. I'm assigned with a task of integrating JanusGraph to an existing Hadoop cluster. Can you please provide me the steps to be followed for this or a reference to be used?

Thanks and regards,
Dilan.

JanusGraph 0.2.0 will be out before next year, definitely.
If you want to try out the ES 5.5 functionality, it is available now on the master branch.
Build a distribution from source code, and you can help test it out now.


On Friday, September 15, 2017 at 10:42:08 AM UTC-4, Suny wrote:

I see JG 0.1.1 is compatible  with 1.5.1 version of Elastic Search. I read somewhere JG 0.2.0 is going to support ES 5.x, but it is going to be released early next year may be.  Is it possible to customize JG 0.1.1 it to work with ES 5.5.1 version ?  Is this a good idea ? Did anybody tried doing this ?

Hi All,

We are working on janusgraph-cassandra api, and have implemented TTL on vertex labels. But we want to fetch the value of TTL for each vertex, 

Below link gives reference to fetch TTL of individual records in Cassandra, and we want to implement this using janusgraph.

Cassandra Query

https://docs.datastax.com/en/cql/3.3/cql/cql_reference/cqlSelect.html

Cassandra Query :-

'SELECT TTL(race_name) 

FROM cycling.calendar 

WHERE race_id=200;

Output:

 ttl(race_name)

----------------

            276  

We want to implement above query of cassandra using janusgraph.

So, can you please give reference to some link, or give some clarity on how we can implement this using Janusgraph.

I see JG 0.1.1 is compatible  with 1.5.1 version of Elastic Search. I read somewhere JG 0.2.0 is going to support ES 5.x, but it is going to be released early next year may be.  Is it possible to customize JG 0.1.1 it to work with ES 5.5.1 version ?  Is this a good idea ? Did anybody tried doing this ?