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JG driver clint API in multi-threading
Liping Huang <liping....@...>
Is the "JanusGraph" or "JanusGraph#newTransaction" supports multi-threading?
The backgroup is I want to load huge data to JG with java API, so I tried create the tx in each thread but I can a lots of "java.lang.RuntimeException: java.lang.NullPointerException" and there are a lots of
14:13:37.831 [pool-20-thread-1] DEBUG o.j.d.cassandra.CassandraTransaction - Created CassandraTransaction@462ca117[read=QUORUM,write=QUORUM]
14:13:42.836 [pool-20-thread-1] DEBUG o.j.d.cassandra.CassandraTransaction - Created CassandraTransaction@32e27b6[read=QUORUM,write=QUORUM]
14:13:47.838 [pool-20-thread-1] DEBUG o.j.d.cassandra.CassandraTransaction - Created CassandraTransaction@69c35246[read=QUORUM,write=QUORUM]
14:13:52.841 [pool-20-thread-1] DEBUG o.j.d.cassandra.CassandraTransaction - Created CassandraTransaction@326765b6[read=QUORUM,write=QUORUM]
14:13:57.846 [pool-20-thread-1] DEBUG o.j.d.cassandra.CassandraTransaction - Created CassandraTransaction@11604ef4[read=QUORUM,write=QUORUM]
14:14:02.851 [pool-20-thread-1] DEBUG o.j.d.cassandra.CassandraTransaction - Created CassandraTransaction@6301d8f9[read=QUORUM,write=QUORUM]
in the console.
Thanks.
The backgroup is I want to load huge data to JG with java API, so I tried create the tx in each thread but I can a lots of "java.lang.RuntimeException: java.lang.NullPointerException" and there are a lots of
14:13:37.831 [pool-20-thread-1] DEBUG o.j.d.cassandra.CassandraTransaction - Created CassandraTransaction@462ca117[read=QUORUM,write=QUORUM]
14:13:42.836 [pool-20-thread-1] DEBUG o.j.d.cassandra.CassandraTransaction - Created CassandraTransaction@32e27b6[read=QUORUM,write=QUORUM]
14:13:47.838 [pool-20-thread-1] DEBUG o.j.d.cassandra.CassandraTransaction - Created CassandraTransaction@69c35246[read=QUORUM,write=QUORUM]
14:13:52.841 [pool-20-thread-1] DEBUG o.j.d.cassandra.CassandraTransaction - Created CassandraTransaction@326765b6[read=QUORUM,write=QUORUM]
14:13:57.846 [pool-20-thread-1] DEBUG o.j.d.cassandra.CassandraTransaction - Created CassandraTransaction@11604ef4[read=QUORUM,write=QUORUM]
14:14:02.851 [pool-20-thread-1] DEBUG o.j.d.cassandra.CassandraTransaction - Created CassandraTransaction@6301d8f9[read=QUORUM,write=QUORUM]
in the console.
Thanks.
Calvin Lei <ckp...@...>
You should post this question to the JanusGraph users group.
Consider using the threaded transaction. See 10.4. Multi-Threaded Transactions . That should help you.
On Friday, December 22, 2017 at 6:56:19 AM UTC-8, Liping Huang wrote:
Is the "JanusGraph" or "JanusGraph#newTransaction" supports multi-threading?
The backgroup is I want to load huge data to JG with java API, so I tried create the tx in each thread but I can a lots of "java.lang.RuntimeException: java.lang.NullPointerException" and there are a lots of
14:13:37.831 [pool-20-thread-1] DEBUG o.j.d.cassandra.CassandraTransaction - Created CassandraTransaction@462ca117[ read=QUORUM,write=QUORUM]
14:13:42.836 [pool-20-thread-1] DEBUG o.j.d.cassandra.CassandraTransaction - Created CassandraTransaction@32e27b6[ read=QUORUM,write=QUORUM]
14:13:47.838 [pool-20-thread-1] DEBUG o.j.d.cassandra.CassandraTransaction - Created CassandraTransaction@69c35246[ read=QUORUM,write=QUORUM]
14:13:52.841 [pool-20-thread-1] DEBUG o.j.d.cassandra.CassandraTransaction - Created CassandraTransaction@326765b6[ read=QUORUM,write=QUORUM]
14:13:57.846 [pool-20-thread-1] DEBUG o.j.d.cassandra.CassandraTransaction - Created CassandraTransaction@11604ef4[ read=QUORUM,write=QUORUM]
14:14:02.851 [pool-20-thread-1] DEBUG o.j.d.cassandra.CassandraTransaction - Created CassandraTransaction@6301d8f9[ read=QUORUM,write=QUORUM]
in the console.
Thanks.