SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
java.util.concurrent.ExecutionException: org.janusgraph.core.JanusGraphException: Could not commit transaction due to exception during persistence
    at java.base/java.util.concurrent.FutureTask.report(FutureTask.java:122)
    at java.base/java.util.concurrent.FutureTask.get(FutureTask.java:191)
    at com.graphbenchmark.common.GenericShell.lambda$exec_concurrent$4(GenericShell.java:139)
    at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:271)
    at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1621)
    at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
    at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
    at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
    at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
    at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578)
    at com.graphbenchmark.common.GenericShell.exec_concurrent(GenericShell.java:151)
    at com.graphbenchmark.common.GenericShell.exec(GenericShell.java:96)
    at com.graphbenchmark.common.GenericShell.main(GenericShell.java:224)
Caused by: org.janusgraph.core.JanusGraphException: Could not commit transaction due to exception during persistence
    at org.janusgraph.graphdb.transaction.StandardJanusGraphTx.commit(StandardJanusGraphTx.java:1391)
    at org.janusgraph.graphdb.tinkerpop.JanusGraphBlueprintsGraph$GraphTransaction.doCommit(JanusGraphBlueprintsGraph.java:297)
    at org.apache.tinkerpop.gremlin.structure.util.AbstractTransaction.commit(AbstractTransaction.java:104)
    at com.graphbenchmark.queries.MixCountDelete.query(MixCountDelete.java:50)
    at com.graphbenchmark.common.GenericQuery.execute(GenericQuery.java:21)
    at com.graphbenchmark.common.GenericShell.lambda$exec_concurrent$1(GenericShell.java:126)
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    at java.base/java.lang.Thread.run(Thread.java:830)
Caused by: org.janusgraph.core.JanusGraphException: Could not execute operation due to backend exception
    at org.janusgraph.diskstorage.util.BackendOperation.execute(BackendOperation.java:56)
    at org.janusgraph.diskstorage.keycolumnvalue.cache.CacheTransaction.persist(CacheTransaction.java:91)
    at org.janusgraph.diskstorage.keycolumnvalue.cache.CacheTransaction.flushInternal(CacheTransaction.java:139)
    at org.janusgraph.diskstorage.keycolumnvalue.cache.CacheTransaction.commit(CacheTransaction.java:196)
    at org.janusgraph.diskstorage.BackendTransaction.commitStorage(BackendTransaction.java:133)
    at org.janusgraph.graphdb.database.StandardJanusGraph.commit(StandardJanusGraph.java:743)
    at org.janusgraph.graphdb.transaction.StandardJanusGraphTx.commit(StandardJanusGraphTx.java:1380)
    ... 9 more
Caused by: org.janusgraph.diskstorage.PermanentBackendException: Permanent failure in storage backend
    at org.janusgraph.diskstorage.berkeleyje.BerkeleyJEKeyValueStore.delete(BerkeleyJEKeyValueStore.java:234)
    at org.janusgraph.diskstorage.berkeleyje.BerkeleyJEStoreManager.mutateMany(BerkeleyJEStoreManager.java:214)
    at org.janusgraph.diskstorage.keycolumnvalue.keyvalue.OrderedKeyValueStoreManagerAdapter.mutateMany(OrderedKeyValueStoreManagerAdapter.java:125)
    at org.janusgraph.diskstorage.keycolumnvalue.cache.CacheTransaction$1.call(CacheTransaction.java:94)
    at org.janusgraph.diskstorage.keycolumnvalue.cache.CacheTransaction$1.call(CacheTransaction.java:91)
    at org.janusgraph.diskstorage.util.BackendOperation.executeDirect(BackendOperation.java:68)
    at org.janusgraph.diskstorage.util.BackendOperation.execute(BackendOperation.java:54)
    ... 15 more
Caused by: com.sleepycat.je.LockTimeoutException: (JE 7.5.11) Lock expired. Locker 819928704 173_pool-1-thread-2_Txn: waited for lock on database=edgestore LockAddr:1660879861 LSN=0x0/0x2045 type=WRITE grant=WAIT_NEW timeoutMillis=500 startTime=1582110227848 endTime=1582110228349
Owners: [<LockInfo locker="1161703245 174_pool-1-thread-3_Txn" type="READ"/>, <LockInfo locker="1296149042 171_pool-1-thread-1_Txn" type="READ"/>]
Waiters: [<LockInfo locker="819928704 173_pool-1-thread-2_Txn" type="WRITE"/>]

    at com.sleepycat.je.txn.LockManager.makeTimeoutException(LockManager.java:1117)
    at com.sleepycat.je.txn.LockManager.waitForLock(LockManager.java:606)
    at com.sleepycat.je.txn.LockManager.lock(LockManager.java:345)
    at com.sleepycat.je.txn.Txn.lockInternal(Txn.java:539)
    at com.sleepycat.je.txn.Locker.lock(Locker.java:503)
    at com.sleepycat.je.dbi.CursorImpl.lockLN(CursorImpl.java:3647)
    at com.sleepycat.je.dbi.CursorImpl.deleteCurrentRecord(CursorImpl.java:900)
    at com.sleepycat.je.Cursor.deleteNoNotify(Cursor.java:2357)
    at com.sleepycat.je.Cursor.deleteNotify(Cursor.java:2298)
    at com.sleepycat.je.Cursor.deleteInternal(Cursor.java:2207)
    at com.sleepycat.je.Database.deleteInternal(Database.java:1198)
    at com.sleepycat.je.Database.delete(Database.java:1157)
    at com.sleepycat.je.Database.delete(Database.java:1259)
    at org.janusgraph.diskstorage.berkeleyje.BerkeleyJEKeyValueStore.delete(BerkeleyJEKeyValueStore.java:229)
    ... 21 more