title: How can I solve this problem loading Grakn schema and data at localhost:48555?
body: <p>I'm using grakn core 1.8.4 with Windows 10. The grakn server and grakn storage are starting up normally, but when trying to load a schema, Grakn returns the following error message:</p>
  <pre><code>Unable to create connection to Grakn instance at localhost:48555
  Cause: io.grpc.StatusRuntimeException
  UNKNOWN: ID block allocation on partition(30)-namespace(0) timed out in 2.000 min. Please check server logs for the stack trace.
  </code></pre>
  <p>I already checked and there are no other processes listening to the same port. I also disabled the Firewall and that did not solve the problem. Does anyone have any indication of how I should proceed?</p>
  <p>Below is part of the log:</p>
  <pre><code>2021-01-05 14:19:24,387 [JanusGraphID(30)(0)[0]] WARN  g.c.g.d.i.ConsistentKeyIDAuthority - Temporary storage exception while acquiring id block - retrying in PT0.32S: {}
  grakn.core.graph.diskstorage.TemporaryBackendException: Wrote claim for id block [1, 10001) in PT0.016S =&gt; too slow, threshold is: PT0.01S
      at grakn.core.graph.diskstorage.idmanagement.ConsistentKeyIDAuthority.getIDBlock(ConsistentKeyIDAuthority.java:320)
      at grakn.core.graph.graphdb.database.idassigner.StandardIDPool$IDBlockGetter.call(StandardIDPool.java:262)
      at grakn.core.graph.graphdb.database.idassigner.StandardIDPool$IDBlockGetter.call(StandardIDPool.java:232)
      at java.util.concurrent.FutureTask.run(Unknown Source)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
      at java.lang.Thread.run(Unknown Source)
  2021-01-05 14:19:24,688 [grpc-request-handler-1] ERROR grakn.core.server.rpc.SessionService - An error has occurred
  grakn.core.graph.core.JanusGraphException: ID block allocation on partition(30)-namespace(0) timed out in 2.000 min
      at grakn.core.graph.graphdb.database.idassigner.StandardIDPool.waitForIDBlockGetter(StandardIDPool.java:146)
      at grakn.core.graph.graphdb.database.idassigner.StandardIDPool.nextBlock(StandardIDPool.java:165)
      at grakn.core.graph.graphdb.database.idassigner.StandardIDPool.nextID(StandardIDPool.java:185)
      at grakn.core.graph.graphdb.database.idassigner.VertexIDAssigner.assignID(VertexIDAssigner.java:334)
      at grakn.core.graph.graphdb.database.idassigner.VertexIDAssigner.assignID(VertexIDAssigner.java:184)
      at grakn.core.graph.graphdb.database.idassigner.VertexIDAssigner.assignID(VertexIDAssigner.java:154)
      at grakn.core.graph.graphdb.database.StandardJanusGraph.assignID(StandardJanusGraph.java:416)
      at grakn.core.graph.graphdb.transaction.StandardJanusGraphTx.addVertex(StandardJanusGraphTx.java:636)
      at grakn.core.graph.graphdb.transaction.StandardJanusGraphTx.addVertex(StandardJanusGraphTx.java:653)
      at grakn.core.graph.graphdb.transaction.StandardJanusGraphTx.addVertex(StandardJanusGraphTx.java:649)
      at grakn.core.concept.structure.ElementFactory.addVertexElement(ElementFactory.java:104)
      at grakn.core.concept.manager.ConceptManagerImpl.addTypeVertex(ConceptManagerImpl.java:188)
      at grakn.core.server.session.TransactionImpl.createMetaConcepts(TransactionImpl.java:1297)
      at grakn.core.server.session.SessionImpl.initialiseMetaConcepts(SessionImpl.java:123)
      at grakn.core.server.session.SessionImpl.&lt;init&gt;(SessionImpl.java:85)
      at grakn.core.server.session.SessionFactory.session(SessionFactory.java:115)
      at grakn.core.server.rpc.ServerOpenRequest.open(ServerOpenRequest.java:40)
      at grakn.core.server.rpc.SessionService.open(SessionService.java:122)
      at grakn.protocol.session.SessionServiceGrpc$MethodHandlers.invoke(SessionServiceGrpc.java:339)
      at io.grpc.stub.ServerCalls$UnaryServerCallHandler$UnaryServerCallListener.onHalfClose(ServerCalls.java:172)
      at io.grpc.internal.ServerCallImpl$ServerStreamListenerImpl.halfClosed(ServerCallImpl.java:331)
      at io.grpc.internal.ServerImpl$JumpToApplicationThreadServerStreamListener$1HalfClosed.runInContext(ServerImpl.java:814)
      at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
      at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:123)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
      at java.lang.Thread.run(Unknown Source)
  Caused by: java.util.concurrent.TimeoutException: null
      at java.util.concurrent.FutureTask.get(Unknown Source)
      at grakn.core.graph.graphdb.database.idassigner.StandardIDPool.waitForIDBlockGetter(StandardIDPool.java:126)
      ... 26 common frames omitted
  </code></pre>