[SOLVED] Neo4j fails to start

Issue

Neo4j 5.15 java 17.09 My neo4j (community server) was running on EC2 without an Issue. Last week we have a java update, but it was still fine afterward. Today when I imported a small data, all went well and when I tried to import the full data which is around 1.5G my process broke and neo4j became un-available. I removed it, reinstalled the same version and the recent version. Nothing is working. Any idea what is happening? error:

JIT compiler: HotSpot 64-Bit Tiered Compilers
VM Arguments: [-Xmx128m, -Dapp.name=neo4j, -Dapp.pid=8597, -Dapp.repo=/usr/share/neo4j/repo, -Dapp.home=/usr/share/neo4j, -Dbasedir=/usr/share/neo4j]
Configuration files used (ordered by priority):
/etc/neo4j/neo4j.conf
--------------------
org.neo4j.cli.CommandFailedException: Neo4j is not running.
    at org.neo4j.server.startup.Bootloader$Dbms.status(Bootloader.java:529)
    at org.neo4j.server.startup.StatusCommand.execute(StatusCommand.java:37)
    at org.neo4j.cli.AbstractCommand.call(AbstractCommand.java:92)
    at org.neo4j.cli.AbstractCommand.call(AbstractCommand.java:37)
    at picocli.CommandLine.executeUserObject(CommandLine.java:2041)
    at picocli.CommandLine.access$1500(CommandLine.java:148)
    at picocli.CommandLine$RunLast.executeUserObjectOfLastSubcommandWithSameParent(CommandLine.java:2461)
    at picocli.CommandLine$RunLast.handle(CommandLine.java:2453)
    at picocli.CommandLine$RunLast.handle(CommandLine.java:2415)
    at picocli.CommandLine$AbstractParseResultHandler.execute(CommandLine.java:2273)
    at picocli.CommandLine$RunLast.execute(CommandLine.java:2417)
    at picocli.CommandLine.execute(CommandLine.java:2170)
    at org.neo4j.server.startup.Neo4jAdminCommand.call(Neo4jAdminCommand.java:123)
    at org.neo4j.server.startup.Neo4jAdminCommand.call(Neo4jAdminCommand.java:42)
    at picocli.CommandLine.executeUserObject(CommandLine.java:2041)
    at picocli.CommandLine.access$1500(CommandLine.java:148)
    at picocli.CommandLine$RunLast.executeUserObjectOfLastSubcommandWithSameParent(CommandLine.java:2461)
    at picocli.CommandLine$RunLast.handle(CommandLine.java:2453)
    at picocli.CommandLine$RunLast.handle(CommandLine.java:2415)
    at picocli.CommandLine$AbstractParseResultHandler.execute(CommandLine.java:2273)
    at picocli.CommandLine$RunLast.execute(CommandLine.java:2417)
    at picocli.CommandLine.execute(CommandLine.java:2170)
    at org.neo4j.server.startup.Neo4jCommand.main(Neo4jCommand.java:41)
    at org.neo4j.server.startup.Neo4jBoot.main(Neo4jBoot.java:30)```

Solution

Make sure you delete all the existing neo4j data before reinstalling. Or, just use a new ECS instance.

Answered By - cybersam

Answer Checked By - Mary Flores (WPSolving Volunteer)