Hello,
Accumulo is running in Kubernetes cluster. Metdata data is stored in HDFS and
table data is stored in Amazon S3. No attempt has been made yet to store/insert
table data. But, when I attempt to create a table in Accumulo via Java API, I
see the following error.
WARN : org.apache.accumulo.core.clientImpl.ThriftTransportPool - Thread "main"
stuck on IO to accumulo-masters-0.accumulo-masters.acc
umulo-k8s.svc.cluster.local:9999 (0) for at least 120033 ms
I see the below error in T-SERVER logs:
2023-02-21 18:04:09,373 WARN [Root tablet assignment retry]
[org.apache.accumulo.tserver.TabletServer]: exception trying to assign tablet
+r<<
hdfs://accumulo-hdfs-namenode-0.accumulo-hdfs-namenodes:8020/accumulo/tables/+r/root_tablet
java.lang.NullPointerException
at
org.apache.accumulo.server.tablets.TabletTime.getInstance(TabletTime.java:60)
at org.apache.accumulo.tserver.tablet.Tablet.<init>(Tablet.java:341)
at
org.apache.accumulo.tserver.TabletServer$AssignmentHandler.run(TabletServer.java:2504)
at
org.apache.accumulo.fate.util.LoggingRunnable.run(LoggingRunnable.java:35)
at java.lang.Thread.run(Thread.java:750)
2023-02-21 18:04:09,374 WARN [Root tablet assignment retry]
[org.apache.accumulo.tserver.TabletServer]: failed to open tablet +r<<
reporting failure to master
2023-02-21 18:04:09,374 WARN [Root tablet assignment retry]
[org.apache.accumulo.tserver.TabletServer]: rescheduling tablet load in 600.00
seconds
2023-02-21 18:07:03,210 WARN [SimpleTimer-0]
[org.apache.accumulo.server.ServerUtil]: System swappiness setting is greater
than ten (30) which can cause time-sensitive operations to be delayed. Accumulo
is time sensitive because it needs to maintain distributed lock agreement.
The installed configuration is made up of 2 instances of HDFS data nodes, 2
instances of T-SERVERs, 1 instance each of HDFS name node and Accumulo master.
> config -t accumulo.root
.
default | table.file.replication ........................ | 0
site | @override .................................. | 2
table | @override .................................. | 5
.
.
> config -t accumulo.metadata
.
default | table.file.replication ........................ | 0
site | @override .................................. | 2
table | @override .................................. | 5
.
How do I fix this problem?
Thanks in advance.
Ranga
